Google aren't closing their main product offering though (Search). A better analogy might be if they decided to give away little biscuits for free for many years and then one day stopped it... point being their main product is subsidising the other 'free' product as a way to get people to use Starbucks.

A real-life example might be their 'free WiFi'. They are well within their rights to stop doing this tomorrow if they choose to. Good luck to anyone who complains because their business is affected because they chose to base themselves out of a Starbucks!