CommentStreams:D2b5551039979d1cdfe405de1504403d

It's a bit hard to tell, the 10-gem ad promos popup with an 8 hour interval for the new accounts. If your account has been around for a while and received all the old promos the 10-gem promos would only popup after they publish new ones, which seems to be happening a couple times a week on average.

But I think you are right, and actually all popups - ad offers as well as sales are now delayed, not sure if it's a bug or feature.