Amazon is offering Prime members one Year of free GrubHub Plus membership(normal price at $9.99 per month ), which includes benefits the following: Free delivery (minimum $12 order)Donations are doubled (e.g round up your change to the near dollar and GrubHub matches it. With GrubHub+ this will be matched and doubled)Exclusive offers and dealsYou must be an Amazon Prime member to get this offer. However, you can sign up as a Trial member (for free for 30 days) to enjoy this deal. Actually, once you sign up the trial member, you can enjoy more benefits, such as Amazon Promotion: Free 3 months U…