Yes, perhaps, if it's all going well enough. Good point, I'll have to think on that.
I know it's depressing to hear but you really need to think about it and do some financial research on the company. Get legal advice. Don't be forced into signing anything just because the company is "short on time". Remember they want YOUR product. If they want it bad enough they'll stick around for a few weeks. Hell they may even offer more money.
Best of luck!
$2M to $6M is a dramatic difference. It's plausible to say that they're trying to do a deal that sounds like $6M but is, in reality, $2M.