I am working on an endless mobile game right now and I'm currently in the designing phase. Most (or all) mobile games especially endless ones now have leaderboards and a player's position in the board is determined by their score. I want to implement a store from which people buy upgrades, new cool stuff that help them gain more score. Will this cause an unfair leaderboards. Should I remove the upgrades and replace them with only customizations in the store like clothes that don't affect the score?
Thanks in advance.