From my own understanding and from Quinn's story—coupled with Cynthia and the twins' testimonies—this was what we found:
Pops was just one of the suppliers and also the manufacturers of the "Dolls" and the Garcia Family just happened to take on that business venture due to how lucrative it was and due to how much of a piece of shit they were.
And the reason these two parties came into a partnership of sorts was that the Garcia Family had a lot of high-profile connections that even Mr. Cuervo wasn't aware of and usually, sick fucks who had a lot of money to burn had the most depraved shit that they get off on.
Cynthia's kinks were already up there but purchasing a "Doll" just goes way, way~ beyond that.
However, we weren't even sure if the two parties actually worked together unless we got ahold of Malachi and he let me see his dad's work.