Why should customers/users of the project have to pay/donate twice or thrice as much for the same result, just because the devs want to live in the US instead of e.g. Paris?
https://www.theregister.com/2021/05/10/untangling_open_sourc...
They need to convince people/corporations to donate, default is that they get nothing.
They need to convice people to stop taking it from the expositor.
Why does the mechanic feel entitled to be paid for their repairs?
They need to convice people to stop driving away.
Why does the .... feel entitled to be paid for their work?
With that said, nothing stopping those people in Berlin from stepping up to other high profile open source projects that are looking for maintainers, raise the same amount of money, and essentially be twice as well off.