Why do you need to charge? Are there alternative benefits that can be derived from an audience on a free publication? Are there personal benefits if you only ever attain a small audience?
It will take significant amount of effort to curate and go through such articles/resources. If I can also get paid for it, it would be better(than not getting paid).
But you've reminded me that it's possible to not charge and use sponsorship to earn revenue. I prefer doing that :) (Win-win for everyone)