I'm sure you're aware that only an MM can pick up shares that are dumped out of an account at $.000001. For retail, $.0001 is bottom. And an MM would be more than happy to fill that order with those he picked up at $.000001.
But sometimes, they get stuck with them when the ticker dies. But that's the business that they're in. Win some, lose some.
Retail can only get .0001. So I got bottoms... MM's crosstrade below the .0000 No major platform will allow you to do anything but a limit order with 4 decimal places.
However, there are some platforms that allow market buys on OTC. I have heard that one could get lucky with a perfectly timed market buy if someone drops the ball on the other end, which is highly unlikely in reality.