Yes it’s a good thing and it’s more locally-running stuff that they’re investigating. Things like fuzzy search on your history, tl;dr bot, etc.
Malware site detection would be another idea, though they of course already have a non-local solution for that. Maybe, we do have to come full circle after all don’t we, a model that can give you an estimation of how likely it is that the page you’re looking at is AI slop.
a) it’s not significant amounts, it’s quite cheap, per user, to run lemmy, e.g. lemm.ee is one of the bigger instances and costs 200 Euro a month, b) tipping 20% on a bill that doesn’t even include any service is not the same as donating to a service you like. This is more like a patreon which doesn’t lock anything for non-donating users.