Coinbase Super Bowl commercial. Chance at 1 million by opting in and it crashed their site!
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Coinbase CEO slammed after claiming credit for Super Bowl ad
Coinbase Super Bowl Ad Shows Bouncing QR Code on Blank Screen
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Coinbase's strange QR-code Super Bowl ad briefly crashes app
Coinbase Super Bowl Ad Hit the Target Audience So Well, Traffic Volume Crashed the App - DailyCoin
Coinbase Super Bowl ad was so good it broke the company's app and site