Facebook has a strong network effect in that everyone is on it and few regular people are interested in signing up for multiple social networks.

OTOH, rideshare drivers are incentivised to have as many (useful) rideshare apps on their phones as possible to maximise their ride volume, and customers are then incentivised to order their rides from the rideshare app with the lowest commission, and eventually a race to the bottom will result.

That's because diaspora sucked. The distributed social network is coming.

I think more people are willing to switch away from Uber/Lyft than from Facebook since (from what I understand about the service) there's nothing really personal about them except for user ratings. If a new competitor opened up tomorrow that promised to be decentralized with fewer fees, I'd bet on it succeeding. Facebook has many more purposes like communication, media hosting, and event planning (with a very strong network effect). People aren't going to give up on that platform very easily.

Wow, this is the impatience of our age. How long do you give a network distribution methodology before you declare it a failure?