Nah. It's not all about "stock". It's about URL blocking what they want when they want.
They were trying to kill Hitman's league before it got started. He put together a fire card and obviously has decent financial backing and URL got scared. So they put the kabash on it.
U Dubb on the other hand is obviously bush league. They mostly book battles URL wouldn't care about. Math vs Head Ice was never going to go down on a URL stage. As long as Brizz and T-Top don't completely shyt the bed URL shouldnt care if they take a battle on U Dubb. URL can't block everything. Just battles they want and leagues that might become viable competitors.
I have no desire to break down the thought process of why the URL isn't "blocking" the UDubb battle. In fact, if this 2v2 battle was on Ballgame battle league, I don't think the URL would block it. 2v2 doesn't really hurt their investment as much as the individual battles do.
Some of you guys look at it too emotionally as opposed to the business reasons behind it. Remember, these guys are under contract & exclusive to the URL.
It is a possibility they found a way to work around it like DNA did. DNA's whole motivation for the 2v2 was money. He's signed to EBL, however he has flexbility. Most of his 2015 was spend doing 2v2, one round battles, with some 3 rounds battles that im sure where worked out.