ja_tbfl’s answers is totally right. to add a bit of detail and clarity, the scholarships regenerate every year, but you DONT NEED TO FILL THEM ALL
If you run sets like motion, flex, triangle, zone, or man you really only need to run a 9/10 guy rotation. So even if you’re redshirting or taking an ineligible, having a walk-on or two each year can be very efficient.