... There are some problems. The most glaring one is that the Epic Pachinko is far, far too expensive. To get the three Christmas Girls only attainable through Epic would cost (assuming you don't get any other girl instead) 2700 Khobans. That is over $100 USD just for three cartoon girls on one online game!

This is, to put it mildly, not worth it to most people.

The Epic is so expensive that its almost an insult that it often gives you mere rares.

If Epic cost 1/5 or 1/10 what it does now, I believe that it would be used far more often, and the content creators would actually make more money. I believe a fair number of people would spring for the girls if the price were reasonable. But as it is, even fans of the game will mostly give it a miss.