Introduce the concept of verified and unverified number of followers. If you're willing to lose "verified number of followers" status, allow someone to pay and

Introduce the concept of verified and unverified number of followers. If you're willing to lose "verified number of followers" status, allow someone to pay and fill out any number they want in the followers field. If they want a verification of the number of followers (so that marketing companies feel comfortable paying celebs to sell products) have them pay a fee. Its a win both ways.