you all over the place man, and it seems your issue with them getting paid is rooted in you being a better student than athlete, and you feel some type of way you feel about how society treats athletes compared to non-athletes....i'm not getting into that lol....i'm just drop an answer to your question about 'what's the incentive':
the incentive for them to be paid comes from all the money they are bringing into those schools....which is the same incentive that the people in charge/with power use when it comes to negotiating contracts, switching conferences, putting schedules together, etc....yea, the players are called 'student athletes', but when it comes to increasing the money making potential of schools, the people in charge are rarely concerned about the 'student', and are only care with the 'athlete'....it even shows when they are 'given' (like they dont earn it through their play) scholarships....when on scholarship, student athletes are not allowed to make any money; receive anything that is looked at as a 'benefit' cause they are an athlete or it can jeopardize said scholarship, including shyt like having someone buy them dinner, a suit, movie tickets, etc.; not only that, but those scholarships had to renewed every year because coaches didnt like having to commit to players just in case a 'student athlete' didnt pan out and/or there was a 'student athlete' coming along that looked like he/she had more potential (this was recently changed a couple years ago, and they made scholarships 4 years as a way to combat people using it as a point as to why they should get paid, which shows you know the people in charge know they are full of shyt)......
just cause they put 'student' at the front of 'student athlete', doesnt make it amateur, and people need to stop pretending like it does....it stopped being amateur when the decisions started being made based off money, and the first contracts were signed (i'm talking coach, radio/tv, etc)...so if they are gonna treat them like professionals (which is shown when they change the rules to make the 'amateur' game more 'pro like') and make money off them, pay them & share some of the money they are bringing in/earning....hell, it already happens...blue chips is real, and student athletes are given money, perks, benefits, etc. it's just all done under the table...so instead of doing it behind closed doors, just make it official....the only reason they wont do that is greed...as long as it's not official, they can give them as much as they want, which tends to be very lil while the powers keep the main take....if it was made official, it would mean the powers would have to give up more of the take, and they dont want to do that....