If you just assume that about 100% of what you read on the internet, see on the tv news, or read in a newspaper is bought and paid for by someone with a economic interest in the topic, you'll probably be right about 90%+ of the time.
Seller beware, yes, but I also think developers with ideas to sell are a dime a dozen - without execution to make it successful/profitable business ideas by themselves are not worth much.
It's two parts: An App Engine/Python for the UI and user registration, and a Linux server for image capturing (Python, Javascript, RabbitMQ, ...etc.). At first we used popular libraries like Phantomjs, but eventually had to write our own to scale better.
I'm experimenting right now with moving the image capturing code to an App Engine managed VM to simplify things and make it scale easier.
Which library are you using for image capture? Been using webkit2png ( https://github.com/AdamN/python-webkit2png/ ) for a personal project, but I'm interested to hear your experiences.