Comment This is not "Rideshare". It's wrong to say it is. (Score 2) 184
Rideshare is a federally recognized term that encompasses carpool, vanpool, train, bus, and even bike/walk transportation. The creator of Lyft (John Zimmer) knows this very well as he created a fairly-well-adopted ride-matching website called "Zimride".
Zimride doesn't make too much money, though, so he sold it to Enterprise (the car rental company who also is in the carshare and vanpool markets) and created Lyft. Along with other similar decentralized taxi services, he is trying to brand their business models as "rideshare" to equate them with more sustainable practices and receive subsequent leniency in various markets and even public funding.
If you want to see what genuine real-time rideshare is, check out Carma (formerly "Avego"). This is a carpool-facilitating program that makes sure that the driver doesn't make a profit off the shared ride (per State Department mileage reimbursement rates).