I don't understand their headlines either.
They just raised $8M Series A on March, 2016 [1], and their business modell is basically about trying to serve you those crowdsourced photos made by volunteeers.
Like $249 / month if you are trying to use those images in your map [2].
There is nothing wrong with that, but I believe it's the opposite of "available for all" and "open repository of photos", as you've quoted as well.
[1] https://www.crunchbase.com/organization/mapillary#/entity [2] https://www.mapillary.com/solutions