The image above is a demonstration of Hacxx Fast Combo Grabber v2.4 (Full Version), it can be a little boring but with one or two hours of your time a user can download 50 to 100 private combos. With private combos i mean combos that aren't available in public places.
The app uses multiple sources and new combos can be downloaded once per week or once per month. To monetize a user can share those combos online and make money with file hosting.
Price: $70