Wouldn't surprise me if it was granted. With the recent shooting, the MSM was quick to "link" Elliot to the MRM. But there was no such link. He posted on PUA Hate, which would not be an MRM site really.
The good news is that more of the truth is entering the mainstream consciousness. As the saying goes, any publicity is good publicity. Terms like "MRM" and "incel" are much more widely known now than just a few years ago. And now when someone hears such terms in the MSM, they hop online and look it up, and they will find tons of articles and information about the truth. Using a mainstream search engine like Google, and perhaps those results will be harder to find and I think one danger is that Google will eventually try to block such content from appearing in its searches.
Anyway, ironically, even if the MRM was a "terrorist group," it would be the least effective one ever. The "MRM" is a movement that doesn't move. It's mainly just guys posting on blogs and forums. Talking but never doing.