There is 0 way to enforce that. None. Nunca. Nada.
You're telling people they should prioritize TNUSA Wrestling over their own bills and daily expenses because they entered a "verbal contract". That's horsecrap. Hot, steamy, smelly horsecrap. Things change. Life happens. Not everybody is as well off as others. And some people agree to some things when money is good and life is ok and have to change plans when life gets tough.
Maybe its just me, idk, but I could give two craps about TNUSA Wrestling's feelings when it comes to keeping food on the table. Sorry, not sorry.