RE: Why are there no postings for charity?

I think the big problem is with integrity and transparency.

Most charity organisations make huge efforts to appear as they can be trusted.

But what's more trustworthy: A known individual asking for help due to specific and identifiable causes, or an organisation asking on behalf of others and issues that it can't fully account for and often conveniently leaving out costs of running the organisation itself?

A charity could be run on Steem, but it would demand a whole lot more than most people probably understand.