No, Instagram Is Not Bigger Than Twitter

From Slate:

http://www.slate.com/blogs/future_tense/2014/12/10/instagram_hits_300_million_users_bigger_than_twitter_not_really.html

Instagram is indeed larger than Twitter if you look solely at monthly active users, of whom Twitter has 284 million at last count. MAUs, as they’re called, are one useful metric of a social network’s size. But they aren’t the only one. Others might include the amount of time users spend on the network, the amount of content they post, and the number of people who see that content. Look at those, and it quickly becomes impossible to say whether Instagram or Twitter is larger.

The question is what to measure and what metrics are most relevant to the platform. Is an instant glancing at a photo equivalent to engaging in a conversation or taking an action after seeing a Twitter post?

More here on this subject: https://medium.com/@ev/a-mile-wide-an-inch-deep-48f36e48d4cb#.nvdt1d7it