If they can't afford to pay a market salary, you should be getting at least 0.5% (and probably more like 1%). Still not life changing at 40mm with no dilution (200-400k), but a little more meaningful.
Now if you get hired by one of these and they make it for a few more years, and you stick around, your salary will likely go up significantly and additional options be granted (though you'll probably need to make an effort to ask), but I wouldn't count on getting life changing equity out of any startup if you're joining after they've raised 7 figures or more.