Charlie Brown
There are detailed contracts signed by all participants (girls) and shadchanim. There is also be a dispute resolustion clause to deal with any potential issues that come up and the outside arbitrators are well known poskim who are NOT signers of the checks.
Your example 1:
Dealt with in the contract
your example 2:
Dealt with in the contract.
It is the first 50 slots who woudn’t pay and any girl who contacts the program is informed as to where she stands and if she is part of the first 50.
anything else bothering you. ANY and ALL questions are valid, just some belong in different forums.