because not everyone wants to play online... everyone spent money to buy this game (god knows this garbage can isn't free), so everyone should be rewarded for playing it, instead of being strongarmed into playing certain modes if they want any rewards
because not everyone wants to play online... everyone spent money to buy this game (god knows this garbage can isn't free), so everyone should be rewarded for playing it, instead of being strongarmed into playing certain modes if they want any rewards