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, rideshar

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.