If a true reddit migration does happen (which I honestly doubt for a number of reasons, technical issues aside) and selfhosting is too expensive, I’m confident the community here can funnel a means to support the server without introducing ads to the feed or site directly.

I can picture a mall for Lemmy merch. Kurzgesagt discusses their financing in this video and paralleling that business model with trendy bullshit sounds like a winner to me. Lemmy.world Calendar anyone?