I wish there was more information in the article about how it effected conversion rates. They've created an interesting model here though.. Its basically free

I wish there was more information in the article about how it effected conversion rates. They've created an interesting model here though.. Its basically free or one price, unless you're really big. If you're really big, they ask you to talk with a sales person, but clearly state a starting price (which I've seen few sites with a "contact us" do) to get the ball rolling.