Used to be able to get Cirque shows, CT tickets, Blue Man Group, etc. all gone now. They're going downhill quick!
They have to update rewards at the beginning of the year. Give it a few days and they should have a lot of the missing rewards back in place. Though, don't be surprised if there are new limitations or higher costs. The bright side though, if they take the reward down like this and it returns, it should be considered a new batch and you can purchase rewards you may have used previously.
My Vegas did a Q&A on Twitter last night for a small amount of time. You can probably look them up and follow the questions and suggestions. They stated that the Shows would be back up shortly and that few new things could be added.