Why did the cw put all the black shows on Friday nights?

I mean even though I barely watch Everybody Hates Chris but loves The Game which is one of the best sitcoms on that station period. But I noticed that the only two black shows they got and the only show that airs new weekly is on a Friday night and I think that's an excuse for them to take the shows out. Anyone else think so too. LONG LIVE THE GAME! which come on friday nights at 7:30 central time. Seriously!