How can we fund Lemmy instances?

TLDR - Why don't Lemmy instances use methods like affiliate links to increase their funding?

I'm a relatively new Lemmy user (I created my account today.) and I noticed that some Lemmy instances are slower than others and that video and GIFs aren't supported. To fix this, Lemmy instances would require more funding. I know that Lemmings don't want instances placing ads in their feeds, but couldn't they find other ways to receive extra funding? For example, the Pi-hole project has affiliate links on their site and they earn a bit of money every time you buy something through a link. Why can't Lemmy instances do the same? Edit: I don't mean ads and I hope they don't follow us here. I mean on the funding page for an instance, they'd have affiliate links to things like Amazon so that they could get more funding. Not as a post either, like Pi-hole's method.