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Duco Janssen Profile
Duco Janssen

@ducoluno

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COO @socialdatabase | X Pro Targeting/Insights - Making X Ads as relevant as they can be for users and advertisers

amsterdam
Joined February 2015
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@ducoluno
Duco Janssen
12 days
In the tech/AI race, many companies keep adding layers — features, tools, products — often on top of a weak core. Over time, complexity grows and control fades. We take a different approach. We focus on getting the foundation right continuously. Because a product is only as
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@ducoluno
Duco Janssen
13 days
Your best customer might buy you. Or copy you. If they copy you, they’re rebuilding yesterday while you’re already building tomorrow.
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@ducoluno
Duco Janssen
16 days
This is me all the time when trying to explain (with the best intentions) how we can help X/xAI teams with their products😅
@nikitabier
Nikita Bier
16 days
How it felt when I had under a thousand followers
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@xdNiBoR
Robin
16 days
https://t.co/ctvziYrTgA Topic specific timelines are a much needed feature! And X literally has people talking about EVERY single topic possible, so it's totally doable to make this. In fact, this was basically the project we made at the xAI Grokathon in London last week! X
@elonmusk
Elon Musk
16 days
The @xAI team is working on providing For You tabs that are specific to topics. For example, a “For You AI” that is focused only on artificial intelligence with no political rage bait. This would be like automatically generated follow lists with content ranked by quality.
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@xdNiBoR
Robin
17 days
Yes! We also think that this is the way to solve onboarding. X truly has people for EVERY SINGLE niche. It's crazy when you look at the actual data. But doing this manually just can't be a good use of time, and especially not when a partner already has this, scaled to every
@nikitabier
Nikita Bier
18 days
Over the last few months, we scoured the world for the top posters in every niche & country We've compiled them into a new tool called Starterpacks: to help new users find the best accounts—big or small—for their interests ⬇️ Reply below with a topic you're most interested in
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@ducoluno
Duco Janssen
18 days
This post and the replies perfectly illustrate what goes wrong with X advertising, largely because X/Grok’s system optimizes for the wrong things. It prioritizes click behavior instead of connecting a real, relevant audience to the advertiser/product. The fix is simple. Very
@dvassallo
Daniel Vassallo
19 days
I don't have a ton of experience with online ads, but I have some. And unfortunately X is just terrible. Recently I had $8K in X ad credits and used them up targeting my followers. 600K impressions, 6.5K clicks, and only 3 conversions. Despite exclusively targeting my own
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@ducoluno
Duco Janssen
19 days
"Every user on X has a level of authority within certain topics, regions, and niches. However, the current model doesn't have a direct "Authority Index" to look at. It treats all semantic relevance as equal. It optimizes for the Probability of a Click rather than the Value of the
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@xdNiBoR
Robin
20 days
@nikitabier @joshelman Hey Nikita, have you seen this? We've build this website for the Grokathon in London that showcases our ability to instantly create a relevant timeline from 1 simple topic. Could it be helpful? https://t.co/ljaLzAmSG4
@xdNiBoR
Robin
22 days
This is exactly what we built today at the xAI Grokathon! From just one prompt and our own Authority Index, we can create a fully custom timeline. Importantly, this is NOT a filter on the X timeline. These are posts from users on our Authority Index.
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@xdNiBoR
Robin
22 days
Have you ever wondered how highly you're ranked on this platform? It's just a small feature we added to our Grokathon project, but I think it's really cool to see your interests and a little AI summary of the account.
@xdNiBoR
Robin
22 days
This is exactly what we built today at the xAI Grokathon! From just one prompt and our own Authority Index, we can create a fully custom timeline. Importantly, this is NOT a filter on the X timeline. These are posts from users on our Authority Index.
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@CornelisseJoran
Joran Cornelisse
21 days
I just convinced one of my friends to make an X account by showing him https://t.co/7VtJ7XZylw. Every topic lives on X, X is truly for everyone. The app utilizes a lot of the latest and upcoming Grok features.
isxforme.com
Check if your interests are active on X.
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@Thomasslabbers
Thomas Slabbers
22 days
Try prompting your timeline: https://t.co/bJciS1rHyp
@Thomasslabbers
Thomas Slabbers
22 days
Just placed in the Top 6 Honorable Mentions at the Grokathon! Ever tried to convince a friend to join X? Now you can just show them. Our project creates a personalized "Best of X" experience: Custom/promptable Timelines - Niche Expert Discovery - AI Generated Expert Debates.
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@xdNiBoR
Robin
22 days
This is exactly what we built today at the xAI Grokathon! From just one prompt and our own Authority Index, we can create a fully custom timeline. Importantly, this is NOT a filter on the X timeline. These are posts from users on our Authority Index.
@davidpattersonx
David Scott Patterson
23 days
The X algorithm should be promptable. Prompt: No politics today - just the best AI innovations. @nikitabier @elonmusk
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@CornelisseJoran
Joran Cornelisse
22 days
Had a blast today at the xAI Grokathon! We built an app that shows X is for everyone. Whatever topic you're interested in, you can now find the most relevant and latest info via our app👇
@Thomasslabbers
Thomas Slabbers
22 days
Just placed in the Top 6 Honorable Mentions at the Grokathon! Ever tried to convince a friend to join X? Now you can just show them. Our project creates a personalized "Best of X" experience: Custom/promptable Timelines - Niche Expert Discovery - AI Generated Expert Debates.
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@Thomasslabbers
Thomas Slabbers
22 days
Just placed in the Top 6 Honorable Mentions at the Grokathon! Ever tried to convince a friend to join X? Now you can just show them. Our project creates a personalized "Best of X" experience: Custom/promptable Timelines - Niche Expert Discovery - AI Generated Expert Debates.
@TobyPhln
Toby Pohlen
22 days
London Grokathon kickoff
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@ducoluno
Duco Janssen
23 days
Working with X data every single day is the best thing. But over the past 1.5 years, I’ve discovered another passion: running. Training for races makes progress undeniable. Over time, it shows you exactly why you trained, and whether you did the work right. Every race is a clear
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@ducoluno
Duco Janssen
23 days
Working with X data every single day is the best thing. But over the past 1.5 years, I’ve discovered another passion: running. Training for races makes progress undeniable. Over time, it shows you exactly why you trained, and whether you did the work right. Every race is a clear
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@ducoluno
Duco Janssen
25 days
My regretted minutes on X are at a peak, even though my total usage and engagement probably is too (which has to do with the fact that I truly believe I should be able to spend 24 hours a day on this platform). I like the idea of the For You page IF it shows me what I actually
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@Max33Verstappen
Max Verstappen
2 months
Yesss @redbullracing!!! Let’s have some fun in the race and finish in style 🙌
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