I am 100% certain that the people giving the instruction were not dive masters. I was working as a Divemaster Intern for Dressel Diver International.
I am currently an Open Water Diver, and during pool demo's Dressel assigned us to work in pairs. One person working in the pool doing the instruction, and the other walking around the pool enticing hotel guests to come into the pool and try out scuba diving. The goal was to sell Discover Scuba diving courses, or better yet, Open Water Courses. Dressel Divers is very strict on how much we must sell, as they will terminate our internship if we do not sell to their expectations (and expectations are high). I usually got assigned to the pool duty (giving the instruction) as Dressel wanted its more experienced people working the customers off the pool deck, in order to increase their sales. They didn't want a fresh intern who didn't know how to sell causing them to lose out on a sale.
So the least experienced person (myself and others) were often the one giving the instruction. The other more experienced interns, were to focus on selling the product and closing the sale. Now, some of these more experienced sellers were DM's or Instructors, but the majority of them were not. Most days I was was working with another intern, me being OWC, and the other intern being Advanced Open Water (he was certified AOW a few weeks ago with Dressel). Even on days where I was working with a DM or Instructor, they were largely not present during the pool instruction that I was giving. Just as Dressel didn't want them to waste time, and so they were constantly finding the next person for me to take in the water. On other days I was largely left to myself, responsible for enticing people from around the hotel area into the water and suiting them up and scuba diving around the pool with them.
I am currently in the process of writing a very detailed letter to the company detailing my experience and I wanted to have more information regarding the PADI guidelines surrounding pool demos to include in this letter. There are several other things Dressel Divers is doing that are illegal and rather deplorable, mainly in the way they exploit their interns (I have a lawyer here in Mexico currently reviewing these other issues)
I have talked to other dive centers here in Playa Del Carmen and have been told several times that PADI is aware of the rules being broken by Dressel Divers, but that they turn a blind eye due to the fact the amount of money Dressel Divers makes them. I am hoping this is not true, but apparently they are telling me since PADI is no longer owned by Divers, it is more business orientated.