This isn't like Uber silently encroaching on a city's taxi medallion laws with grey-area definitions of "taxi" and "employee". Facebook cannot do something like this without attracting scrutiny at every stage, and as we saw with Robinhood, the financial regulation systems are relatively quick to act. Especially if they "defy govs", then those government's will have every reason to come down hard.
This is one area where Facebook will need to finesse their way through-- moving fast and breaking things is not a winning strategy.