of course they make money from wanabe. Why do you think they take guys with 0 hours, when this market is filled with pilots ready to fly.
schools pay airline "undertable" each time an airline send a student to an TRTO.this is how this market work, if a school want a contract with an airline, a school has to give some undeclared money to the pocket of the managment.
Still I don't know how much the receive, probably a lot.
that 's another way for a company to make money, some charge pilots for time building.