From your FAQ:
Q: Cost and make money?
Not very sure how to make money
Not sure you'll make money from this service but with this talent it seems you can easily segue into other services.
For example, HN doesn't have any usable way to save and retrieve threads that you find most interesting/informative/funny. You've solved half of that already.
Solve the other half and you've basically built a bookmarking service. Some good UI/UX and clever marketing positioning and there's a product probably worth paying for.
Best of luck.