“What if they choose to re-list on the QB/QX instead of doing an RS at the end of the 180 extension (assuming they don't exceed $1 by then - which I think is highly unlikely).”
They could certainly do that. But it will create two problems:
1) A large number of the institutional shareholders will have to sell because the can’t hold OTC penny stocks and
2) Their ability to access financing will likely be reduced to convertible debt…and as we all know that would kill the stock eventually.