Here's another thought, make a game worth paying $.50/day for. Because this game isn't it. Nothing about the for-pay version has changed since it was released, except for the LFG tool. Actually, it has gotten worse; now it lags horribly, crashes, and has new bugs on top of the vast majority that were never fixed since pre-launch.
If 1.5 million people didn't want to pay for it last year, why would they want to pay for it now?