A good research team is a handful of people working on a focused set of questions. A good product team is probably around a dozen people minimum? Especially if

A good research team is a handful of people working on a focused set of questions. A good product team is probably around a dozen people minimum? Especially if you need to hit the quality bar expected of a release from a BigCorp. You've got frontend, UX, and server components to design, in addition to the research part of the project. The last real app I worked on also included an app backend (ie, local db and web API access, separate from the display+UX logic) and product team. Oh yeah, also testing+qa, logging, and data analysis. And after all that investment, God help you if you ever decide the headcount costs more than keeping the lights on, and you discontinue the project... Public app releases are incredibly expensive, in other words, and throwing a model on GitHub is cheap.