I'm actually kinda concerned. I makes the game less personal. I'm also kinda worried that it allows even more of an edge to "money spenders" over the patient, hard working summoner like myself. Also the fact that newbies are sellling some of the harder to get cards for dirt sucks the value out of the card for the rest of us that know the value. It also takes the option to have a "safe trade" within the clan or amongst allies. Obviously you would cut a clan member a better deal than a stranger, right? Now we would have to gift and hope you don't get bailed on.
I will admit that it was kinda nice to get a AA+ winged demon for 10 ep though. I do feel it's an attempt to get more people to spend money on soul points, and it's probably working. I've actuall been a bit tempted myself