It is a one off. Beside he won't get $5 per ghost crate because steam takes 30%. That leaves $6.99 between shroud and bluehole. Being greedy bluehole I cannot see them only taking $2 per crate. In other games such as dota 2, they give 15/20% frome sales to the pro teams that come up with a hero set. It is still a lot of money by any standard.

Just imagine how much Ninja would get to take a sponsorship from say Nvidia/Kingston/intel, it is easily a few million dollars a year. In addition, Ninja get $2.49 per twitch subscription per month, with his sub count oh man it is a lot of money. If shroud was streaming fornite full time, he would be a solid 2nd most viewed streamer in fornite, and his sub count would be at least 50% more than what he has now.