Board Thread:Game Discussion/@comment-23575531-20130925201109/@comment-11490363-20130927133507

Still a Wikia Contributor wrote: there's a spirit of competition now? It's you versus the bosses. PvP is a waste of time and is too unpredictable, and a waste of cubes. It would be different if the player ranking were based on fighting in a legitimate PvP system outside events, but that will never happen. The competition is not in the form of PvP. If you help other players strengthen their deck by trading, you are making it easier for them to beat you in the rankings. Trading might just end up being a way to make you buy more cubes because you now have stronger competition.

Sure your deck gets stronger, but the advantage is almost always for the weaker player even if the trade is 100% equitable since the improvement to their deck is greater than it is to yours. There is little incentive to trade with weaker opponents, they gain more than you do.