I can also write about this problem from the perspective of someone who was a participant of the old YoBit signature campaign. The lack of funds was the reason why I quit this campaign (like many others) because the payments became random and only a few were able to get paid for their work.
What is now happening is actually identical situation (at least as regards the payment), and they seem to have the same exit strategy. Wallet will probably be refilled from time to time, but not to the extent that it satisfies all existing users (last time I checked there were almost 600 active participants), and some of them will just remove signature.
Quantity instead of quality is not sustainable in the long run, I think most can agree with that.