@EnglishMobster Sure, it's no secret. Everything I do is transparent, and I want others to benefit as much as possible from it. Kbin was designed with small instances in mind. Of course, there are optional components like Redis and Rabbitmq that increase the requirements a bit. It's hard for me to assess the impact on users at the moment. I've been maintaining my Polish instance (karab.in) for over a year with these two hetzner vps - 6eur-9eur/month + ~2$ s3 storage.
Kbin.social has been maintained on a VPS for €16.11/month up until now. Currently, I have upgraded it to the highest package to handle as much traffic as possible when the worst comes. It now costs €66.91/month.
These are the statistics with approximately 7000 unique visitors per hour and a fairly intensive usage of the site, including the entire federation. That's all I know for now.