Good question. I think the answer is that if you agree not to email it to anybody more than 49 times (I think that was the number agreed to), then after that it is “sold out.” I think it’s more likely that a money laundering scheme moved enough money so they thought they’d better quit. There’s more information on that at https://medium.com/illumination/the-real-trump-art-27db92fcc6f2?sk=c970816c3261913827470eb976ebde30 (at the bottom of the article).