It’s kind of hard to believe now, but when it first came out, Words With Friends really wasn’t all that popular.

The videogame — which is, in many ways, a twist on digital Scrabble — did ok for its first year, but it was only after musician John Mayer called it “the new Twitter” in an Oct. 5, 2009 Tweet, that things began to explode — and the growth rate has been phenomenal ever since.

Read more at CNBC.com