In one option, there’s high turnover (bad for customers, employees, and restaurants) leading to restaurants not signing up with future food delivery companies due to being burned in the past. In the other option, there’s a heathy competition leading to customers paying realistic prices (an undistorted market) and giving delivery workers and restaurants more stability.
1. above the competition - gouging, profiteering
2. below the competition - predatory pricing, unfair competition, dumping
3. same as the competition - price fixing, collusion
All are illegal!