No, Flappy Bird developer didn't give up on $50,000 a day - CNET

Although the hit game is no longer available, more than 50 million people who downloaded it are still generating millions, or billions, of ad impressions, and Dong Nguyen is still getting paid.

Big Business News in 2014: How It Turned Out - WSJ

Flappy Bird creator says he can't take this anymore. To pull down Flappy Bird in less than 24 hours - SoyaCincau

Why Flappy Bird Shut Down

The Evolution and Explosive Popularity of Casual Games - The Koalition

What was the failure of Flappy Bird?

Flappy Bird

Flappy Bird developer makes $50,000 a day through ad revenue : r/Games

Making a game like Flappy Bird (Intermediate), David Such

Flappy Bird

Making a game like Flappy Bird (Intermediate), David Such

Did Dong Nguyen really use no marketing for Flappy Bird as he claimed? - Quora

Your Game Is Not the Next Flappy Bird - Vox