Charging rent on a game is a bad trip, and you sure as hell won't get any fans that way. The trolls won't pay for it, but neither will anyone else. That, and it's not the best format for strategy- excellent for shooters or something like EV (which actually synthesized characters to keep it interesting, though it had no MP), but no good if you wanna think or do anything complicated, because you'll simply get obliterated by the first twit you run across, who'll realize that if you build 5000000000000000000000 of the second most powerful unit, you can almost always win. Which means that anyone who hopes to stand a chance in the game will start doing that, too, and soon nobody's having fun, they're just holding mouse-clicking contests. I can think of specific examples of this, but I'm sure you can supply your own if you play strats so it's unnecessary. It's too bad, really, because AIs almost invariably suck in strats, so you're really left with no way to play the game.
Actually, a MM Escape Velocity-type game (with some significant improvements) could be quite good. I know I'd buy it, and that's saying something.