The stated reward is for purchasing Local Deals. You will receive a lower reward when purchasing Getaways. No rewards are given on Charity/Promotional, Groupon Epic Deal purchases, iTunes Credit, gift card purchases or when using Groupon Bucks. No rewards given on Goods category purchases.
Rewards are not calculated on postage / handling / delivery costs or associated purchase taxes in your region (This may include but not be limited to VAT, GST etc).