As I said, it's the same in most sports today. In darts, for example, the players must agree to ALL the terms of the contracts, INCLUDING DISPLAYING THE MAIN SPONSOR(S) LOGOS. If not, they don't play. Like it or not, that's the way sports and sports contracts are these days. It was mentioned earlier how Zmarzlik was recently threatened with a fine for not standing in the correct position. It's the same with darts, and players can be fined for walking back from the board on the wrong side. Yes, ALL players are made aware of this stuff, so you can be sure that ALL GP riders know what they need to do.