Online food delivery has worked for years and I believe is profitable, at least in the UK.
I'm not entirely sure what their long term plan is, but I'm hoping this is just an attempt to establish a monopoly that can then be exploited to turn the operation into a profit.
http://www.theguardian.com/business/marketforceslive/2014/ju...
A pity to see even they're running so lean on the profit margins - I've found them to offer the best organised process for actually getting the groceries inside, where all the crates are staged first, then the bags unhooked and hefted inside, taking very little time at all, versus the loose bags or even completely loose items of the other supermarket delivery operations.