If they sued Ajax, there are a number of attorneys (a few that I could put him in touch with) that would take it pro bono just for the free speech issue alone
Well, I grant you that. But if a lawyer is going to take the issue on free speech alone, that's what's going to be addressed, and likely only that. It really depends on the state you're in, though, and i'm not that familiar with Canada law.
In California, if you get slapp sued you can file an anti slapp special motion to strike. It does a few things: it halts the ability of a plaintiff to amend their complaint (so they can't create a moving target by amending it each time you blow their complaint apart), it halts discovery (so the plaintiff can't sue you just to find out what you know and who you talk to), and if you win the motion, the case is dismissed with prejudice and the plaintiff has to pay your attorneys fees (HEE HEE AHHAHAHAHAHHAHHH...)... The downside is that you really don't want to raise a fact dispute in the anti-slapp motion because this will make the judge think there should be a trial (if somebody says something is true, it is accepted as such for the purpose of the slapp motion. The judge is forbidden from deciding what is true and false). Other defenses (such as opinion, priveledge, etc...) should be raised instead. So if the program, for example, says that you they heard you behaved "outragiously", bla bla bla... while you might
want to dispute it, it's legally more beneficial to just say "heresay, opinion, irrelevant, etc..." and get their "evidence" deemed inadmissible (showing the judge that the plaintiff, based on their initial complaint and admissable evidence, have
no chance of winning their case... one of the primary things on which an anti-slapp motion is supposed to be decided).
While it means you win the case without it going to trial, it also means that you don't get to hold the program over a fire until they spit out those documents you've wanted for so long. Of course, if going to court would be extremely expensive, would require you to relocate across the country, or otherwise would be unfeasible or extremely difficult, it's easier to just win the case off the bat, without having to go to court. Of course you still get to say "I was sued by the program for defamation and I won!".