I was trying to find out how much it costs to use Google Maps in a business product (SaaS) I literally could not find a price without the "give us your details and our sales team will be in touch" which to me translates as "We need to work out exactly where to stick the hose to suck out the money".
I know that sounds somewhat daft but I like been a paying customer as it means I can get some support plus the documentation for mapbox is lovely as well.
Compare that with this https://www.mapbox.com/plans/.
I know who will be getting my money in the near future.