Ignore the last comment, you don't get my point. First off, I train boxing, Muay Thai, and Brazilian Jiu-Jitsu, but no I haven't had a fight yet. I have however cornered a few people from our gym. Anyways, sure there are some politics involved in MMA, that's a given. But that doesn't mean that someone not going to get to the UFC/Strikeforce/DREAM or another top promotion because they don't have the looks or build of a poster boy. That has nothing to do with it.
Now UFC is a company, of course they're going to be concerned with draw. Kimbo Slice is going to bring in more viewers to MMA and more money into the company, he earned his way into the UFC, he deserves to be there. Now, I don't think he's anywhere near the level of 90% of the UFC heavyweights, but until that's proven he deserves to fight there. As far as people being allowed on the show without having fought before, TUF use to be that way every season except the last I believe. There have been plenty of people in TUF history to never fight MMA before TUF. Not to mention, heavyweight prospects for the ultimate fighter aren't as easy to find as let's say lightweights, so naturally they're not going to have as high level of talent.
And then Cover 2, you're calling Kimbo the UFC's cash cow as if they would fail without him. Fact is, people like Brock Lesnar and Kimbo Slice bring in a lot more money to the UFC, but without them the PPVs would still bring in big numbers.
Keep in mind, there a lot of fighters that are solid fights in their division who have to wait years sometimes to get a shot in the big leagues, the UFC especially. But the point is, if you're talented enough and win enough fights you're going to get your shot eventually. I've never seen an MMA fighter with enough talent to be a top fighter retire without ever getting their chance. Now obviously, some of the best MMA fighters in the world aren't going to fight in the UFC, but it's not due to politics. Granted Aleksander Emelianenko will never fight in the US again, it has nothing to do with politics. People like Sergei Kharitonov and Fedor will probably retire without ever fighting in the UFC, but they did fight in top promotions against top fighters.
My point, tell about a fighter who deserves a chance in a top promotion and won't get it due to politics (Not their record, the kind of competition they face, and their actual talent, we're talking about strictly politics.)