I judge my donations as paying for content I enjoy. I donate to several web comics and some youtube channels. I enjoy the content but dislike web ads, so patreon is great for me.

I don't have a set budget but I don't tend to go for higher tiers.

I support someone as long as I'm enjoying the content they're creating. So for webcomics, if they're still creating and I'm still reading, I'm happy to keep paying.