Nope, I didn't. It's a long story - I was supposed to, but that was the breaking point for me. I'd already done about a dozen at that point for games leading up to it...can't recall all of them but it included World at War (both editions), the Harpoon remake, OAW III, Massive Assault, and several others. I think Moby Games has my credits listed but I'm too lazy to check.
As for low cost, that had little to do with my rate. I can't speak poorly of it because that side job came at a time when we desperately needed it, so I have nothing but good things to say/think about Matrix. It just became something whose reward was not worth the effort it would take on my part. By the time this happened I had a better-paying job, thankfully...but this side gig helped bridge the gap big time.