Most of these third parties are using official API's to get pricing data, if there is something with a hidden price do ask and someone can probably help you figure it out. One reason AWS got popular is that it actually was historically much HARDER to get pricing from your internal IT team / vendors like IBM etc. So AWS wasn't the cheapest (by any means) but was pretty clear on cost. So it's interesting to hear that AWS is purposely hiding pricing and making price complicated to "waste company's budgets".