So people have been mentioning in chat that there are problems with being locked out of the naughty bundle. I did not have this problem so did not pay much attention. However, the instant I bought the naughty bundle for presents, the gem version became locked as well. Then I noticed something else: previous to the event, the black market section in my merchant said I still had two Lucky explorers available for purchase. Now though, they were locked out as well. So talking with people in chat, it would appear that the limit set previously was 15 lucky explorers, but the event update lowered that to 14.
This means that anyone with 14 or more would start already locked out of the naughty bundle, and for me who had 13, once i bought the bundle to get 14 suddenly became locked out of any others. In other words, the limit should be 17 now, but for some reason it appears to be sitting at 14.