This is an excerpt from PokerNews article found here:
http://https://www.pokernews.com/new...rica-27183.htm
Seeing they are not considered a poker room, PayPal is ok with it according to this article.
"This could signal a major change in the industry as GlobalPoker.com isn't characterized as gambling. The company's sweepstakes model operates in partnership with Facebook and PayPal. Global Poker's patent protects its business model, meaning other companies may not be able to follow suit.
"Our unique and patented Sweepstakes model offer players something different without straying too far from traditional poker," Escalante said."