I think this is starting to change, slowly, but many schools do/used to get kickbacks from snack vendors in exchange for placing their products in vending machines in the school.
"Oh, you need new uniforms for the basketball team? We can help you with that. Just put our machine in the hallway, and our logo on the scoreboard." This is not hypothetical; this is how things were run when I was in school.
"Oh, you need new uniforms for the basketball team? We can help you with that. Just put our machine in the hallway, and our logo on the scoreboard." This is not hypothetical; this is how things were run when I was in school.