This one seems pretty simple. For $5 you can get a $10 Target eGiftCard on Groupon. Whether you're a stingy grandparent looking for a way to be a bit more modern and avoid writing a $6.72 check for little Suzy's graduation gift, or if you're just hoping to double your cash somewhere you already spend money, it's not a difficult deal to understand. There's one big exception for all of this, though. It's one of Groupon's "invitation only" deals, which means you'll likely need to already have a Groupon account in order to take advantage of it.

Read More