That’s why I suspect there’s someone who’s been spreading “classified” info around, and has been one for quite some time. RMB is simply the first guy who openly and blatantly brags about knowing things and who is noticed by quite a few people. It gets him attention, which is all he craves. He keeps tagging Matalas in his tweets about season 3, too - he clearly wants to rub it in that he KNOWS.
What I’m more surprised about is that he’s so friendly and seems to love everything (it’s hilarious to read how this riles up his base of PIC haters tho), but then, maybe Paramount simply went down the “keep your friends close but your enemies closer” road and said “look, we know you got your hands on info - how about you say nice things and in return we let you brag about knowing things without slapping you down - you get attention and we get some nice early promotion and can keep our secrets for a little while longer… deal?”