Does the second half actually explain how it works? Because the first half, which was all I could read, doesn’t really explain how they get the clean money back.

I use shaarli https://github.com/shaarli/Shaarli It doesn’t sync with the browser but there is an android app for quickly storing links.

Honestly, those decades of solutions are useless unless they have both a version number and a date associated with them. And if that date is more that 6 months ago, it’s probably still useless even if it has both.