It fills the niche imgur originally did (i.e. no bullshit image host) but uses a community funding model instead. I'm pitching in $20 every month to keep it from turning into imgur. If you were thinking of putting something on imgur, please just put it on catbox instead and toss a couple bucks their way once in a while so we can continue to have nice things.
Sadly, that model is often not sustainable for various reasons. The site recently lost a significant income stream when Patreon rugpulled their account.
It was originally started to fill a pretty specific niche for a specific type of community, but has since grown way past that, to the point that it's quite a lot slower than it used to be due to the increased bandwidth usage. If you want it to survive, I would honestly advise against advertising it.