Nobody is above the lure of money/ power. Everybody has a price. It just depends on the level you are at.
Everybody doesn't have a price.
I'll go with a braindead example: How much money would you ask to kill your own mother? How much do you think they offered theymos to leave the forum to Roger Ver? What is your answer? Not enough?
Maybe It will come as a surprise to you, but some people do what they do just because they think it is the right thing.