Does kbin really have 250k users? Do you have a source? I'm curious, but that'd be great if true.
I'm guessing this is more like 250k unique IPs over a day that viewed, and not 250k registered users which I'm guessing is more like 15k or something. Either way, that'd be more than I expected which is good.
kbin had about 165k "visits" yesterday. From here. I'm not quite clear what that means but I'm guessing it's either a site load, or some group of accesses from the same IP (i.e. if someone accessed the site for a few minutes, then went quite for an hour, then accessed again, that's a couple "visits"). But I'm 100% guessing.
kbin has about 25k users of its own at the moment. From here
The fediverse has about 130k users total. I'm not sure if that includes Mastodon, but I think it might.
Edit2: Oh my am I wrong about Mastodon being included. They've added more than 130k users just in the last WEEK. There's over 12m accounts at the moment (according to this) which is fantastic.