In two days we celebrate a holiday in which the main theme (aside from gratitude) is "bigger is better." That's why Rebtel is here to change that mindset by offering two iPad Minis (black 16GB WiFi-only) to a pair of lucky winners, along with a voucher for $100 service credit! The VoIP provider is promoting its iPad app, which is a free download that allows you to make free calls over WiFi and cellular to other Rebtel users, as well as cheap international calls. (If you're not an Apple user, the company also has Android, Windows Phone and PC apps available.) So you know what to do: take a moment to reflect on what you're thankful for, and leave a comment below to enter to win.