yes so if there were a charity tab etc it could be buried inside a top level navigation tab, but you said it the issue would be would the content be aggregated or curated? Perhaps you could have a tab that would be curated monthly for charity type posts. Great idea, ill jot it down for a future build coming.
the hardest thing with users is trying to figure out whats easiest for sorting / filtering and how easy is it to do vs how smart is it doing it lol. thanks for the comments, great ideas.