you need 12 5 star rides to make up for 1 one star and get above 4.7. If your average is say 4.8 (you get 4 or 3 stars every now and then because people assume it's "average"), when you get a 1 star review, you need 37 "normal" rides to make up for it and come back to 4.7. This is pretty insane IMO