Here’s an article from San Diego about Mountain West (a none P5 that is allowing schools to give the stipend) and PAC 12. I know at least a few of the schools went with a higher stipend as Colorado State and the two Utah teams are at amounts over $3500. Pretty open as to what the schools can do.
A coach could decide just to make the stipend a part of the scholarship, so if a scholarship is valued at $25k per year, it’s now valued at $27,500 and if you get 10% of it, you now get $2750 instead of $2500 (and on the bill it will say $2500 in tuition, $250 stipend). Some teams do have a limit on how many players the team can have, and how many non-scholarship players they can have. Baseball has a minimum amount for scholarships. Most sports have as a minimum ‘book money’ to be a scholarship player and sign the NLI. I know DU men’s lacrosse had 48 players on the team this year, but at least half of them were not scholarship players. You can only dice the scholarship so fine before it is meaningless (and better to take the need based aid if available).