Twitter’s CEO is on the hot seat

Twitter has launched two new features that have generated excitement among the user base: the ability to send Direct Messages to a group and a camera function that allows people to shoot and tweet videos directly from the Twitter mobile app.

Related: Twitter launches a ‘Buy’ button

Shares popped this week after Twitter announced plans to start syndicating promoted tweets on popular magazine app Flipboard.

That could be a nice new revenue stream for Twitter. Selling ads outside of Twitter could make it more like an ad network. It’s a strategy that has helped social media rival Facebook (FB, Tech30) as well as search king Google (GOOGL, Tech30).

But Cook shut up the doubters with strong earnings and sales. For Costolo, it ultimately comes down to the numbers as well.

If Twitter’s user growth improves, his job is probably safe. If not, the cries for his head from the Twitter peanut gallery could get louder.

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