If he dropped it back in 2006 he'd been set sales wise.
But as for what caused the sales, it's a mix of label problems and lack of promotion for the new replaced singles TVT fucked him over AND went bankrupt, making Jon having to move to a new label within 4 years. Even had to scrap the "Snap Your Fingers" "Act A Fool" singles and replaced the official first single with "Ms Chocolate" which didn't take off and I aint heard no one talk about that track....The current single for the album is that joint with LMFAO, outta your mind and I didn't even know he made a video for that til just recently....
But as for the album, there was some bangers on Crunk Rock....Thought it was gonna be all on that house/electro tip he's been on the past year but he still has his signature sound on here