I'd expect a free or half-priced alternative to do well, I just wouldn't expect it to be a good business. I think it's telling that they didn't have any traditional investors in their most recent round. VCs seem to want nothing to do with Lyft at this point. Only time will tell if GM is a better investor than every VC who passed. I suspect that they're not and that Lyft doesn't have much of a business (Line trips are likely never profitable, and they seem to have a problem keeping riders around that Uber doesn't seem to have).