Instead of trying to get players to by special boxes in the store, you should focus on fixing the problems with game you create with each update. Game crashes more than half time since the last major updates to the gyms. Do you beta test updates before releasing them? Have your staff earn their salaries by actually checking to see if something works before adding it to the game. The raids are horrible and theres rhyme or reason to them as to why or when the game will crash during them.
Bogin about Pokémon GO, v1.37.2