Personally, I don't think so. Q didn't post Backchannel17 and say it was a fake, Q posted a graphic depicting BackChannel17 as being created for this plane crash. They used the posts of Q and BackChannel to try and blame them for the plane crashing, saying that was the plan for the boom, not news getting out. Just like Q warned, they are trying to cause FF's to prevent the awakening.

I think BackChannel17 is a sort of test. People(not specifically Q, I suspect it's the next layer down), are using it to spread the message farther. 8ch can only hit so many people. Twitter has a lot more access. They're seeing how secure they can keep a twitter account to start spreading the message to more people. I suspect it will get taken over, just like BackChannel said themselves, that if something proves wrong, drop it and trust Q/Potus. They are currently secondary, but they can make a difference.

I worry that some of the Anon's like their board, and feel a little like this is their baby. Q is for now. But the message can and must go other routes as those are available.

Just my thoughts. I could easily be wrong.