How to turn paid members to staff and let them to collect donations?

Right now the only way I know is to manually send staff invites to paid members. Is it possible to make some automation with zappier? Also, I want mu staff to have personal donate/support button below each ot their posts - right now this is only possible if they put button in their post manually, but I want a way to make this automatic - each staff member to have PayPal address or Patreon in their profile fields and button to be automatically attached to their posts.