Although Pinterest missed second-quarter revenue and earnings estimates, its stock still jumped 20% today. Why? While the 11 cents per share in earnings was significantly lower than the 18 cent estimate, the revenue of $666 million was just a tick short of the $667 million estimate, and “when it comes to social media stocks, showing revenue growth is better than not showing revenue growth at all,” said Cheddar News’ Michelle Castillo. “They had a growth rate of 9% year over year” — compared with Twitter’s decline of 1%.