We have had a few attempts at bike share or even free bikes for public use over the years. We got BIXI a few years ago but it didn't make a profit and eventually the city took it over. I assume they see it as a tourist draw even if it is not profitable in it's own right. There is a big stand outside my office and I do see bikes coming and going. There is no provision for helmets. Technically the laws call for helmets but the Provincial Government and Toronto Police have publically announced they are not enforcing that for adults.

As an aside, one time I saw the current Premier of Ontario (who was then, ironically, Minister of Transport for the province, and thus perhaps responsible for the non-enforced helmet law) out biking with her wife or girlfriend and neither was wearing a helmet. I thought momentarily about getting a video and posting it on Youtube, but it's not really my style to publicly embarrass or harass people.