Some small instances are seeing sudden increases in numbers of registered users (4k to 5k new users) but not an equivalent growth in activity, my guess is someone is creating accounts on instances without captcha enabled for account registration. Most of the top 10 fastest growing instances shown here fit that criteria.
This is something that I don’t quite get because Kbin doesn’t even have an option to collapse comments, are there are any other things that you think Kbin does better than Lemmy? I also don’t like how the thumbnails are stretched for image posts, and that images open on a second page load instead of inline. The lemmy experience in 0.17 was a bit messy with webhooks, but 0.18 is much better (check lemmy.ml for an instance running 0.18).