"Lucky Cards" have been in my Daily Challenge list for the last 3 days, and I've yet to find *even one*. The task is to collect **21** of these things, and despite having this running on my tablet for **literal hours**, not a single one. And I'm supposed to find 21? Sure. Yeah, that's going to happen. So as a result, can't complete the daily challenges, make no progress. This is apparently "fun" according to Zynga.