I don't get this. Why? It's easy, yes. It takes NO time to make your own.
I've got three in the 'fridge; one with a dill flavor, one with horseradish, and the other just ... well, mayo.
(Reminds me of putting a touch of melted butter on a roast beef sandwich the other day and Ashley yelling "what?!" She didn't after she tasted it...with the horseradish mayo.)