honestly if a rental market exists I see no point in scholarships

I guesss it could work on people that dont have 10$ to buy a spellbook but if you do you are probably better off on your own.

From a manager standpoint I think is much better to just rent your cards, you will probably make more money, and you will have to do little to no work

Axie schoolarships works because theres no rental market for axie, but if you think about it a schoolarship is just that... a rental that you pay at the end of the month. In splinterlands you can rent inside the game! so theres no need for schoolarships.