It also operated under an enforced government mandate to provide an unprofitable rural air service that only worsened its financial condition.

ECONOMIST: Letters

But as popular as Tumblr has become, the service remains unprofitable.

WSJ: Tumblr CEO's mom gushes over billion-dollar baby

But the online service was still unprofitable, says Hirai.

FORBES: PlayStation Network Sales Top $800M, Still Unprofitable

In the three years and three months since Vonage began offering service, it has proved widely popular--and wildly unprofitable.

FORBES: The Trouble With VoIP