I am just thinking out loud here.
What about ,if Witness's were required to mine account creation coins. THEN the witness's donate those coins to a pool for people to use to create accounts. Then when that person signs up an automatic vote goes to that witness?
Again just thinking here, not actually saying that's what I want.. I am really studying thinking about your idea here.
witnesses already get paid. This is double dipping to me. Might as well find another group of people, who don't even need servers, who play a role in onboarding new users.