They certainly are not the only ones that do not pay tourney fees. Pacific, Bodog, Action Poker most Cryptos and some Tain skins do not pay them either. Here is a list of who does and do not.
http://www.rakerebatereview.com/onlinepokerrooms/compare.asp
I made it earlier this year so some might have changed. I’m not trying to defend them either. I think not paying out on blackjack is wrong. I’m no longer affiliated with the site I linked too. I hope mods are not offended. The site is essentially closed now.