I really don't understand that quote. I didn't watch the video so perhaps there is some context I am missing...How are apps a Ponzi scheme?
Basically, everyone wants to make their own branded apps, but few people are actually going to bother to buy them. The publishers are the victims, not the guys at the top of the pyramid, it's the app makers who're going to profit.
It might be a scam, but for it to be a Ponzi scheme, the developers would need to use the money they get from the first publishers to, say, buy the apps they've developed to show it gets great returns to get new publishers to pay... (or something like that)