Even the ones who are paid, they might cheat but they are still involved.The culture of hip hop is from the people at large like you and me who may like to participate in the four elements in some way or have a deep appreciation for it.
Pointing to the entertainers who get paid to try and represent the culture is misguided. Once you get paid on a large scale to do it you are indeed compromised and it is no longer just about the love of what you are doing. But most people in the culture are doing it for free so let's point at them.
But speaking of the ones who are "underpaid" or whatever, at sxsw they had all these forums, lectures, interviews in front of crowds, break dances, freestylers, somewhat intellectual performances, ignorant club performances for the night and on. All these people participating on all sides were brought together by the culture, people rocked the same type of brands, the hat in the same ways, speak the same slang, enjoy or create the same type of entertainment, the same type of art, understand the expressions of the dancers etc.. motherfukkers even walk the same way.
These are all traits of a culture.
But dude has 1 example and 1 quote from a website as his claim.
It might be enough to raise reasonable doubt, but faaaar from denouncing hiphop being a culture.