Thanks for making this! Would you mind sharing what sources this looks at, or are you keeping that proprietary?
A few I'd like to keep to myself, but if you poke around it's obviously no secret that stack overflow contributes a fair bit. The code is some frankenstein monster of a few failed projects I've created over the years, but so far it's doing its job!
I feel like that's a good and fair practice in general when copying content on the web, but obviously what you do with other sources is between you and them.