http://www.techradar.com/news/get-up-to-99-off-mailbird-pro-this-black-friday

Mailbird Pro, our favorite premium email client, is available for as little as £0.39/$0.69 in a special deal for Black Friday and Cyber Monday.

Everyone will receive a discount of at least 50%, and you can ‘gamble’ for a better deal by sharing it on Facebook, Twitter, Google+ or LinkedIn – up to a maximum of 99% off the usual price. You have four chances to spin the wheels and get a better random discount.