Maybe I'm missing something, but I don't believe there's any limit on how many click rewards miles one can transfer to United or American. If you have a million clickrewards (whew!) why can't you become an instant AA million miler?

Additionally, if you go to their home page at www.clickrewards.com , there are lots of opportunities for redemption, including (today) 16 cruises and 80 land vacations at 40K clickrewards miles each.