He gets paid very very well, he's the only skier who's dropped oakley twice. dropped J.Lindberg for Cross, who gave him another signature line, it's safe to assume everytime he switched companies it was partially because they were offering more money.
Don't forget he's sponsored by some of the biggest companies in the sport; redbull, POC, Head... you get the point.
Jon is probably the most marketable skier in the world, he super consistant with his tricks, he pioneered modern double flips, for christs sake he has two filmers following him around right now.