So he was not the one that actually released it then. A forbidden URL, he really is being charged for copying and pasting it. Bizarre language, "caused the data to be made available to other persons online". The indictment has the hyperlink in it itself, I would imagine the indictment has been read by more people than were in the IRC channel. Seems hypocritical to me.
See also: http://venturebeat.com/2011/12/30/stratfor-data-dump/
"It's time to dump the full 75,000 names, addresses, CCs and md5 hashed passwords to every customer that has ever paid Stratfor."
That is followed by a request for other people to make use of that credit card information.
I don't know enough to make a judgement on whether he can be expected to have known that the data dump contained credit card information.