My name on Patreon is the same as it is here, you can see the variety of things I support and the different levels of support they get. I’d look at what they’re offering at reward levels. Honestly I would not do any rewards that involve mailing. Ideally the things you offer as rewards are things that are easy enough for you to provide. I usually support things at a $1–3 level unless it’s a fandom I’m creating fanworks in (I don’t create fanworks for money) or unless the reward they’re offering is really good at the higher level, or for friends I want to encourage at a higher level.
I don’t pick which things to support based on the rewards they offer, tbh, I do it based on “Who is creating quality creative works? Who should be doing it full time?” I throw $5 per month to Ngozi Ukazu, for example, because the free webcomic she does is absolutely fantastic and has changed my standards for media in general. I don’t support her at the level I do because of the livestream, though that’s good, or the process blog, though that is also good. I do it because I’d happily pay $5 per month for the work she produces if I was buying it on a newstand, I can afford it, and it makes me happy to know that she’s making a living off of something she’s essentially creating free for everyone.
It’s an easy way to put my money where my mouth is, to support PoC and LGBTQA and disabled content creators who otherwise would have a very hard time supporting themselves via more traditional creative avenues. I think I toss about as much into Patreon as I do into the media services I buy into to avoid ads since we cut the cable cord seven years ago. And pretty much for the same reason. I cannot stand ads, they make me angry, and I use blockers, but for many small content creators ads are where they have traditionally made their money. This is better.