If you want to pay them then they are responsible for paying tuition, room, board, books, all the free clothing, etc...
They are literally given about $200k (room, board, tuition, food, top line training, clothing, free things from tournaments, tickets, etc) if they stay 4 years and have free marketing and ability to increase their social/ network following and have the resources from playing to be set up nicely with jobs after playing because of boosters, etc.
I do believe they should get a part of merchandise sales