Has anyone tried using DigitalGlobe (the service that's used in the OP) for on-demand photography? Their landing page [1] provides several call-to-actions: download Silverlight to see an interactive demo, set up a live demo, or regular Contact Us form. They apparently have a partnership with CartoDB [2], which states that day-of photos can be requested (at $30/km2) and is integrated to their API -- but then states it's for Enterprise clients only (though later in the page, says "Anyone can access this data").
I guess there's probably not a service that just lets you fill out an online form and pay by credit card to get an image on demand, but would like something a little more frictionless than having to meet with a salesperson when I already know exactly what I want to try out.
[1] https://www.digitalglobe.com/products/spatial-on-demand#feat...