If you mean in invitation system where users can be 'rewarded' with the ability to create a registration for one (or more) other users, sounds like a good idea!
For example: !allowinvite <nickname> 2 reg
That would allow user 'nickname' to addreg two new accounts with profile 'Reg'.
But managing that will need a range of new commands and checks, that can best be written as a hubscript once the API is in place. Getting the right to invite can then be limited by time, based on sharesize, etc. etc.