Yumi and Tsuneyo are far too close to the gods of the world for it to be a coincidence that they're the only other ones in on some portion of the secret. Tsuneyo's dad having kept her isolated in a nest of far too many wires, and one of the gods taking a keen interest in corrupting Yumi, as we saw during the kiss and when she was brought back into the fold by specifically engineering the two month time jump to get her back into class ASAP. There were even multiple USERs fighting for a connection during her scene at one of the beach events - one possibly trying to stop the other from using Sensei to fuck with her more, which might have fucked with the graphics but actually gave them a bit of peace.
It's possible that the more the gods interfere with your life, the more you become awakened to the truth of the world. I wouldn't be surprised if Makoto was getting into it soon, given Bluejay and one of them ("Remember to smile") deciding
her dad was going to be dead. Or Molly, because of Halloween and the use of her to provide weebnotes, especially given the intentionally suspicious timing of her bringing up time travel to Tsuneyo in this update. Or Ami, because she's an awful, boring character who needs to be rubbed in the audience's faces more and Sekai is up to no good. Then Uta at some point.
The rest of the girls (other than Yasu, who's barely even human at this point) are relatively untouched so far, I think? Correct me if I'm wrong.
If you want your daily dose of irony, Atlas Shrugged was written by a purported libertarian who died while on welfare. Curious.