I don't quite understand the comparison to pricing at Amazon and Etsy.[1] Amazon and Etsy are marketplaces, which justifies their commissions. Weebly's product

I don't quite understand the comparison to pricing at Amazon and Etsy.[1] Amazon and Etsy are marketplaces, which justifies their commissions. Weebly's product lets users create their own sites. The pricing makes sense for Weebly (users can waive the commission by paying a flat monthly rate), I'm just confused by the comparison in the article. [1] "Weebly takes a 3% cut of sales, while competitor Etsy takes 3.5%. Amazon charges 6-15% of a seller’s sale price, and so does Buy.com, which in addition takes a flat 99 cent commission from each sale."