So it seems that all the MW3 clan challenges have vanished.  My MW3 clan is level 31 and tried as hard as we could given our schedules to compete in all the challenges we could.  But I suppose since Black Ops 2 came out, MW3 challenges have simply been abandoned.

It's a disgrace, especially considering we initially had to pay for Elite to get access to the challenges.  To just take the rug out from under people's feet like that with no warning is the worst kind of treatment for your customers.
So what will you do when the next Call of Duty game comes out? Abandon the Black Ops 2 challenges?  That's just ridiculous.  It's a damn hard thing to level up a clan, and to just stop it on a whim, or worse, do it to try and get people to buy the next game.
There's been no official info on why no new MW3 challenges have been posted for days, but if they have truly stopped with no notice, then my whole clan is done with the COD series.  We'll switch to a game where the players are respected.