Well, it is Cryptic's game and for all we know NCSoft could be a shit company and that's why they went their own way in the first place. This could be some revenge or something.
Edit: Didn't Blizzard do this in EQ?
Every MMO company looks at the biggest guilds out there to beta their game, and then they invite them by going to the guild's website and contacting them there. Blizzard didn't solicit people inside EQ, they just contacted Legacy of Steel, Fires of Heaven, etc. outside the game with invites.
Cryptic is basically stooping to the levels of gold spammers now. And for all we know Champions will be the same as CoH - the same boring content every 10 levels.