Google is pulling the plug on the platform after eight years.
The photo-sharing app relied on the social network for its success, but now Facebook may depend on Instagram for its longevity.
Will this prove to investors that the social network can make money?
For a lot of us who first got online in the 1990s, Yahoo! was a pretty special place. But that was a while ago and Yahoo! has since gone through numerous periods of tumult. What's next for the company? Plus, social network fans shop differently.
Despite pressure to show uses ads and make hay from their personal data, CaringBridge refuses. They're a special case, but are there lessons here for other social networks?