[Aeolun]

Doesn’t it make more sense to only send money to repositories that signed up in the first place?

That might mean the first people to register get a whole bunch of money at the start, but that just seems like an incentive to sign up.

[nevernude]

That is effectively what happens. Unclaimed funds are reallocated after a few months to projects that have been claimed. Like you said, that's a good incentive to sign up sooner rather than later.