Judging by your comment, looks like it's actually led by paying users, or whatever it is that these "members of the e.V." are.
A member is someone that signs up and pays a membership fee (currently that's at least 24€/year, see https://join.codeberg.org/). So yes, the people that pay get to vote. But we're also the ones sending money in to pay for the servers (which is the main source of income for Codeberg), since the e.V. is considered charitable I'm pretty sure this is legally a donation but im not gonna pretend to know things about our tax system.
I get that this sounds strange to people outside of Germany but it's a very common thing here, your local football club is an e.V. for example. It's also not that rare within the foss/software/nerd space, KDE and the CCC are both Vereine as well.