The problem is that De'Vo isn't the most honest person as well. He try to get credit for every single variation of older moves. He even make fake videos to prove it. And it's the money what motivates him, like in theor11. And if your problem is that XCM has been renamed to Cardistry, I think they have big differences. If you watch nowadays cardistry guys (like Tobias), you can see that they do things what De'Vo could never do. These are not De'Vo's one-handed displays, but two-handed 'smooth' cuts.
And I have to agree with la0o9, for example I don't know what I would do without Jason England's tutorials