Because you decided to go the fail Battle Master Bag route, people aren't going to bother with the gambling anymore.
The point of the market I thought was to provide a few extra things for people to use their coins on. Now instead of wanting to keep money in your pockets, I predict that no one is going to dish out anymore for the the rolling of the bags. I can see them going to 3rd party sites to buy credits (cheaper than your cartel coins) and just buying whatever they want that way.
If you're wanting a continued successful in-game store for people to dump their money into, make it worthwhile, or else they're just going to go to 3rd party websites that can ACTUALLY OFFER THEM the things they want.
Are you kidding? Literally EVERYONE I've talked to has loved the random bag idea and has spent money on it. Bioware, from a financial point of view, hit a homerun with what they did. They've made so much money from cartel coins.