CitiBike in NYC is a well run operation. Not sure if it turns a profit but they get subsidized by CityGroup in exchange for naming rights. They seem to be expanding.
Citigroup pays for advertising :)
Citibike runs a small profit. They even pay NYC for the street space they use for their stations.
they are expanding as fast as operationally possible.
NYC is a perfect landscape for cycling. Mild Climate, 80% of all trips less than 3 miles, shortage of roadway space, and time is of the essence ( NY minute )
My typical routes are 1-3 miles in Manhattan midtown - the bike is faster than any other mode.