OTC is like being in the gold rush in 1849. A lot of people panning for gold, and most in the wrong place, or after the gold's already gone. Sometimes you find a nugget like TSNP, but honestly like 80% are hot garbage. If you're on the OTC QB it means you're doing the right things to at the very least inform investors and some measure of substance behind your company. ALPP has been OTCQB for a while, which is why I was never worried at it diving off the map. Should have loaded more at that bottom and sold less on the way to now, but that's a whole other ball game
Volume is definitely not a problem on the OTC, we're talking Billions of shares traded on the regular and seemingly more money is flowing in every day when people see that you can ride a triple 000 to $0.20 and have Millions of shares of a legit Nasdaq caliber company in a few weeks like TSNP. I've never had an issue selling, but maybe acquiring shares can be difficult sometimes depending on the situation/stock.
I've also never had a stock go to true No Bid. I have lost my ass on more than a few. I've also gotten stuck in an SEC suspension/investigation (DECN was one that people in here got caught with me in), but I then traded that successfully afterwards a few times. Your best bet in sussing out the bad apples is to research the people making the decisions. OTC companies are often small operations so past history and decision making me buy or not buy. It is one of the reasons that I love playing David Lazar shells (like XMET. They have a regular schedule, Lazar is professional as hell, has a brand that he doesn't screw around with R/S (although the resulting R/M companies often do) and they have predicable profitable results.
OTC catalysts are things like getting current on filings (which removes the stop sign), updating share structures, court updates or SOS filings. There are lots of places that provide various levels of information. Ihub is dodgy but like here there are people who share hours of decent research and crowdsourcing information, stocktwits is garbage, Twitter is a pump and dumpers paradise but it moves information faster than anywhere else, better if you can find a good discord of like minded traders. Some people pay to be in the private discords and if that works for them then power to them, not for me but it does mitigate some of the risk.
Any other specific questions?