[...] A valuable asset of so-called sharing-economy businesses like Uber or AirBnB is typically their network of committed suppliers--Uber's drivers or AirBnB's hosts. This too is an asset of lasting value that both companies have invested heavily to develop (and which they invest to protect, for example, against legal actions requiring them to treat their suppliers as employees).
pretty straightforward, but an aspect that's often neglected in the discourse. their assets aren't just the algorithms/etc - it's the reputation, brand, community