[doyoulikeworms]

The Wikipedia article goes on to talk about G+'s very low engagement. I wouldn't be surprised if Twitter's engagement rates were somewhere near Facebook's.

> User engagement on Google+ was low compared with its competitors; ComScore estimated that users averaged just 3.3 minutes on the site in January 2012, versus 7.5 hours for Facebook.[22][23]

(https://en.wikipedia.org/wiki/Google%2B#Growth)

[mrweasel]

That makes you question if they actually had 300 millions "active" users.