[linklonk]

Yes, to address this I have an FAQ entry for it (https://linklonk.com/about): " Is it a filter bubble? On LinkLonk you pay attention to those who you chose to pay attention to. In a sense, LinkLonk is a filter bubble.

A filter bubble is a problem when a system chooses content to show to you without giving you clear control or an explanation of how it came up with these recommendations.

On LinkLonk the ranking mechanism is transparent and is easy to understand. LinkLonk does not try to guess what you would like. What you see is controlled by your explicit ratings. For example, when you see a recommendation from users, LinkLonk explains what links you have in common with these users. "

Also, I think "echo chamber" (compared to "filter bubble") is often used to describe a dynamic that emerges in groups - when members of a group reinforce who is in and who is out of the group. I think LinkLonk avoids this problem by not having the concept of a group. Every user decides for themselves who they want to hear from. There is no boundary to reinforce - no echo chamber walls to erect.

I don't know for sure whether it would become a harmful echo chamber or a useful tool that helps you find high signal-to-noise information. I'd like to give it a try to find out.