What makes you think that TNA won't make them wrestle. That's what they make The Guns do. That's what they make GenMe do. That's what they make Beer Money do. Trust me, TWGTT will wrestle. A lot. They'll be used correctly. They're ex-WWE guys. At times it seems that the only guys that are used the way the should be are the former WWE guys. Not because they're WWE guys, but because they're simply .. good.
However, if Shelton and Haas want exposure and more money WHILE they have no restrains and are not told to slow down in the ring and cuffed to the chin by WWE's cockeyed standards of what's good and bad - then TNA is the place. What's the point of having great matches if nobody's going to see them? That's TNA in 2005-2006, and that's ROH since 2002. These guys have kick ass wrestling, but noone's watching it, so in the end it turns out to be more of a hobby than a job. It's a job in TNA, they'll actually pay them good money and they'll be on TV. It's better for their wallets and families, and sooner or later they'll go to TNA.