Instead of simply advertising for another charity (Such as March of Dimes, etc.) and giving the money to them (through a link) and they use some of that to pay employees, etc.
The recipients (the hospitals, kids, etc.) won't see it as coming from Steemit, or our community. So even though the donation would come from us, it would get us no recognition and not increase awareness to the public.
RE: Why isn't anyone Steeming for charity?