Honestly I don't think CoX would be a big enough market for gold farmers to give a crap about. Thinking about cost benefit, the time they spending grinding for inf in CoX, more than likely would have made more money from WoW or ESO or what ever is out there right now
You would think that, but when the AH was first introduced, and CoH suddenly had an economy...you couldn't go five minutes without blocking at least 5 of them. There were times when the chat was utterly overwhelmed by inf seller spam, and that was long before Freedom. If there's a game that they can potentially make money off of, they're there. I remember clearly playing in the Aion beta...and there were spammers in the -beta-. The servers were going to be wiped, and they were still there, trying to get people to buy their stuff.
I'm not fond of the chat restrictions on free accounts, but I can understand them. We can hope that the spammers would overlook a zombie game with a (relatively) small following, but it would be potentially harmful to a relaunch to count on it.