For any limit fans, this is really amazing news that should be spread far and wide.
Cliffs: Every Merge Skin (Carbon Poker, Aced, etc.) now uses PokerStars' very low (the lowest online) rake structure for fixed limit games - Limit Hold'em, HORSE, everything. And it still offers 35% flat rakeback, plus an extra ~15% easily attainable from VIP points, rake races, promotions, and reload bonuses (unlimited ones on e.g. Black Chip).
That means playing Limit on Merge is exactly the same in terms of rake levels and 'price to play' after rakeback as holding Supernova Elite status on stars. And it's like that from Day 1 onwards, because rakeback is paid daily.
Software, support, security and player traffic aside, Merge is now easily the number one choice for any fixed limit player who cares about rakeback.
U.S. Players are also accepted.