I think many are very interested in supporting charitable projects through Steemit. It's not that your idea isn't well-received, or hasn't been considered before, it's that we are early in the game. I think we'll see focused charitable groups pop up to support various causes. We need to move beyond the growing pains of only voting for 'steemit content' and start creating a community.

As an example, see my new initiative for the fiction author community:#descriptionsonthespot.

I think these types of focused communities take time to grow, but this is a natural outlet of how to utilize the Steem blockchain.