I'm curious if this has been discussed before and what the responses are?
To use a recent example I was involved in... ArcheAge is considered a highly Pay2Win style game because you can sell game time with real money for in-game resources (gold). With that gold you can turn around and buy most everything you need.
A player who spends 1000's of dollars will be instantly better off and have a massive advantage when compared to a player who spends only $50 or similar.