So I've been playing Bakery Story for quite some time now ( 2 years) and I really love this game, But I have never gotten a Gem Sale Now, my sister just recently got into bakery story (almost a year now) and she always gets a gem sale! With the recent price hike on everything I thought MAYBE I'll get one, but nothing. So I was just wondering if there's anything I can do to increase my chances of getting a gem sale? Or is this out of my hands and I can't really do anything about it? Does anyone else have the same problem as me? I have brought gems before, but still nothing...

Any suggestions?