Reply #31: It's not offering an incentive. The players get no reward. Being hit in football

[Critters2]

is as natural as snow in January. When such an occurrence take place, as will almost certainly happen, donations will be made. But there's no incentive to the players doing the hitting.

One could just as easily offer a donation every time it snows in Maine. It will snow in Maine, not because of the donation offer, but because that's what happens. Same principle.