There's at least three proverbial sayings that apply here, one of which is hundreds of years old and another that is at least 2,000.

But as a 2 year old article on this very topic put it: "The decision shows that communities ultimately are the property of the companies that run them, not the members who supply their content." - 'Panoramio founders try persuading Google not to kill site', CNET, 24 Sep 2014 (https://www.cnet.com/news/panoramio-founders-try-persuading-...)