[Stormcaller]

why is hotmail so popular in this list? I thought gmail was the most used and even yahoo seems to go on par with gmail here.

May it be because they didn't actually hack dropbox but just hacked about 400 accounts and hotmail users were easier targets because that demographic was more like our parents?

Also the list skips from b-e to b-i in 400 users, surely if there were 7 million email addresses this shouldn't be the case?

[dangrossman]

Gmail, Hotmail and Yahoo! Mail each have ~300MM uniques per month. Gmail only became the leader, by a percentage point or so, at the end of 2012. You would expect roughly the same number of addresses from each provider.

[untog]

Your tech bias is showing. Gmail is huge amongst techies and the young, but Hotmail and Yahoo are still very, very big e-mail providers.