It's a so called reverse merger, happens all the time in pink sheet land. I have seen at least 50 of them just this year. A private company wants to go public in a fast and cheap way. Totally common and nothing strange about that. They then can do better capital raises and what not and they will make a ton of money if their stock is worth a lot at some point. BMSND is just the shell they merger into, just like there are 150 other shells out there waiting for a RM candidate.