When I visit kbin.social, I see new posts regularly. On other servers posts stay on the frontpage for multiple days. This is also true if I switch their sorting to “hot”. So that is probably not the difference.
What is kbin.social doing differently?
Trite answer: When it’s done
More in-depth answer: Currently there’s no set date. It depends on how quickly they can tear out all the WebSockets code and replace it with simple HTTP (that’s the BIG change, will fix a lot of different things), and then test those changes. The hot_rank fix has already been merged, that’s done, but they want a stable, cohesive release with all the good stuff.
Current estimations I’ve seen range from 1-2 weeks, but it all depends on how fast they can get it coded and tested.
I believe it’s supposed to drop next week as long as there are no last minute problems.