A good number of the TNA roster are ex-WWE guys in semi-retirement.
I almost decided to go to a TNA taping at Universal Studios when I was in Orlando.
You should have, I've been to a show at the IMPACT ZONE, and it was absolutely amazing, especially since you get in for free. Given that was a PPV I'm sure it would've been more exciting than a taping, it still would've been worth your while.
And as some of them are ex-WWE guys, look at guys like Sting, AJ Styles, Beer Money, Crimson, Matt Morgan, Samoa Joe, and the list goes on. That's a really unfair stereotype given to TNA by WWE fans.