Yet another bloody "hacker in a hoodie" picture. Credibility -= 5 points. Bleh.
GhostSec appears to have become its own distinct group, with unique identity, collection of memes, goals and strategies. They do appear to have some COMINT capability which is not OSINT (to put it another way, they are not solely monitoring the social media streams of the IS). By going independent (which other groups have done in the past) they remove themselves from the Anon-hivemind and do not need to adhere to the existing body of memes; they are their own entity now.
I have no information on their capability to infiltrate groups; if I did I would not talk about it because it would put them at risk. I can say that some network assets have burned down so thoroughly that it makes me cringe. Who did it and why, I do not know.