There is many that does, but in the grand scheme of thing, those many is a minority of the whole. Probably around the same ratio of people who torrent or download by other means pirated stuff. Sometimes they buy what they pirate, because they like it.
There is so many games/vn's (whatever), and you can only support so many creators before your wallet shut you down. But that doesn't keep you from download stuff.
Ya the way I look at places like F95 are as a way to try games out. If I really like a game and especially a dev, I look to see if they sell the game on Steam and if they do, I buy it - I own both City of Broken Dreamers and Being A DIK on Steam as a couple examples and I'll continue to buy them as they release new parts of the games.
It's really kinda cool because there are games I've bought that I would have never even heard of without F95, a pirate site, lol. The irony is just kinda funny with situations like that. But ya I'm sure some people just leech, too. My point was just that I know there are tons of folks that I speak with frequently in multiple threads I follow here that actively buy games they play and back developers on their respective Patreons as a way of keeping them going. Ultimately I think when developers release something players really like, they are happy to fork over some cash as a way of saying thank you, I would like more, please.
I also love the review system here - some people really take the time to write good, detailed reviews which are a huge help to people.