gm offer boosting Feather for people who made there weapons +18 long time ago before merge and they deleted the +18 weapon after boosting the feather and it was only for craft weapons users for active users who collect the vouchers during event time and there account showed logs history
that's was the rewards for people who spent alot of money to make there weapons +18 and those weapons were deleted
BTW GutterMagic and Sineda not Tier 1 GMs there r Higher department