Everybody is self-serving...a$$holes/hustlers disguise their self-serving ways as "standing up for everyone". Oldest trick in the book, persuasion.
Kanye, Joe Budden, Slim Thug, etc... these people only care about their own situations but know people's desire to believe in something, especially a "righteous rebel" type is a great business model and will get them to support their (selfish) cause...thinking they're standing up for the little man and the good fight. If Jimmy Iovine aint probably drop him and forcibly put him on the Independent path then you wouldn't hear none of this from Slim Thug...it woulda been "mum is the word" forever on all these big wigs if they was still cutting you checks.
And all these black republican/pro-Trump face ass dudes are just smart dumb nigs, don't let their rhetoric fool you, they're usually dumb af. I'm sure some of the black conservative sect are just staunch business people and have explicable reasons why they support/vote republican...but most these dudes are just stupid and think it's cool to do.