The links in this post are for funding the two developers who work full time on Lemmy, the software.
The instances are sponsored separately via their own contribution links. E.g. look at the sidebar on lemmy.world and you’re probably gonna find them.
For the system to work we need to fund both the software development and the instances. Currently the software development funding is further behind as it still doesn’t cover two modest salaries. On the other hand I think lemmy.world is sustainably funded. Someone correct me if I’m wrong.