Apparently you've heard wrong. The only thing Aigis has ever done is remove older units from the standard gatcha and then have pickup gatchas where you can only roll the blacks/plats listed on the banner. Premium rolls always cost 5 SCs, with the same rates, and SC prices have always been the same. They don't sell anything like plat/black tickets either. There was a very early SC price reduction, but nutaku got that too.
The only special deals basically have the same crystal price, but give you a special bonus on top of it(Alicia and the starter pack). There's only 2 of these over 4 years and they're not they're always available to be purchased once. You can definitely make the case that they didn't understand the EN market well, but that's usually where you get some assistance from you're localization partner.