If you’re confused about the whos and whats of these offers filling your inbox, clarity has arrived in the form of a quick primer from the folks at Online MBA. They’ve put together a lovely, old-timey visualization illustrating what four of the big guys dealing the deals are actually offering. Groupon has as many salespeople as Facebook has as many employees — does FB stand a chance? Does LivingSocial take more of a cut than Google? These and other questions you didn’t know you needed to know are answered with 1960s crispness and style. They left only one thing out: the name of the winner.