The real business behind Delos was not the various Parks...it was to data mine all the guests...and also the very rich could achieve immortality by putting their consciousness into a host body...no different then our present reality where the super rich get to indulge in things that the average person does not...they don't need to have a large number of customers because the ones they do have are willing to spend absurd amounts of $$
in our world today look at what Facebook, Google, Microsoft are doing...they are data mining everything...every time you use Windows 10 it has tons of telemetry being reported back to Microsoft's servers- every website you visit, every click...so I imagine they could develop a profile of every person in the same way that Rehoboam does based on your likes, dislikes, patterns etc...Facebook does it, Google, Apple etc...Smart TV's storing which movies and TV shows you watch etc