They had a thread over in the forum about some guy selling logins. He was also selling logins for a couple other sites. The Dog's disciples were talking about pissing away over 100 dollars or so to find out who it is. I notice that one of his sycophants has already answered your question. It's not "illegal" to sell an invite, but it's certainly unethical.
I noticed one of his "bloodhounds" uses an avatar of Tom Cruise. Another guy is a big fan of Queen! LMAO.... Anyways, I don't sell invites to any site. I question the mental health and sanity of people who are willing to beg,borrow,steal and buy invites to a newsnab site.
Bookmarks