For those who don't use Amazon on a regular basis, and therefore don't get bombarded with pleas to become an Amazon Prime subscriber, it goes like this: If you pay $79, you get free two-day shipping on all packages from Amazon for a full year.
For people who buy Amazon products at least a couple of times a month, this would clearly save you some money in the long run. And it keeps the company's most active (and hopefully loyal) customers coming back for more.
And adding this incentive? Well, it makes a lot of sense, as soon as they -- as TechCrunch puts it -- "can work out how to do it without losing money."
I had an Amazon Prime subscription last year, that I let expire, but with perks like that, I might just be lured back in.