They come and go, the time it takes for a removed to return varies.
It hasn't been available in a very long time. Assume it's gone. the best option will be that it returns at a higher price.
Mirage dumped the 90k tower suite offer, but returned with two new, more expensive, tower suite awards.
I tried to redeem that a few weeks ago and they had no availability.. like ever. So that's probably why. I tried literally 10 different sets of dates.
But really, I mean it's a $50 room during the week.. I'd gladly pay that. I guess they win my business because I'll definitely be back to Luxor in the near future.