Well...this is not exactly fair. FIRST fix your issues. Make sure that EVERY player can claim his free 25 boosters from smartphone EASY. I mean without restart phone/game/reseting google id/ clear game cache etc..etc etc. THEN and only then you can ask from players not to use emulatores. I will use them until the day that i will open my phone, start the game and after pressing the green booster the button will turn blue. Without any/ other "hacks". Cheers.