It was specifically an IE7 tax by a company called Kogan: http://www.kogan.com/a...

		zxtang on March 27, 2013 \| parent \| context \| favorite \| on: Mailchimp offers 10% discount for using 2-factor s... It was specifically an IE7 tax by a company called Kogan: http://www.kogan.com/au/blog/new-internet-explorer-7-tax/. And here's the HN discussion: https://news.ycombinator.com/item?id=4109137