It doesn't surprise me that Snoop took the opportunity to engage in a little product placement, though he's also joked about pot brownies on Martha's show. What's more interesting is that Landy's deal with Snoop appears to be a case of the tail wagging the dog. References to cognac started appearing in hip-hop lyrics as early as the 1990s – somewhat, it seems, to the surprise of cognac makers. Previously the brandy (named for the region in France where it's made) was marketed to older, upper-class and upper-middle class white folks, at least in the U.S.
After a few years, the stodgy, slumping cognac industry seized on the trend and started enlisting rappers for endorsement deals; right after Snoop was shown pouring yak into mashed potatoes, Hennessy released a special edition cognac to celebrate Obama's inauguration.
African-Americans probably don't make up the percent of the market that some cognac makers claim. But the cognac industry continues to court African-American customers heavily, and rappers are still coveted spokespeople for luxury booze (even if they're also, uh, shilling for Hot Pockets).