The decline from 07-09 alone painted the picture of his future. He's so monotone and trite, his fans must of jumped onto Rick Ross' ship or something (who had like 6 times the sales first week earlier this year)
Curtis hasn't been a thing for a very long time, and he was one of the biggest Hip Hop fads of last decade who thrived off beef. Now that most of the artists he has beefed with have faded away, the gimmick has worn off. I'm not surprised by these numbers. I doubt he is either. His bank is full.