Ask HN: Is a pricing grid really the best option?

I've seen it recommended more then a few different places that the more choice you give a potential purchaser the less likely they will be to make any decision at all. Why then does nearly every pricing page have a grid of at least three choices? I realize having one choice (with upgrades after the purchaser has signed up) is not always possible but I would think I'd see more of the single plan with upgrade here (on HN) then elsewhere. Any thoughts?