Why aren’t they running full nodes? Because that would cut into their profits.
Get me in the top-20 and I’ll run one public and one private. OR... I’ll host a Steem festival/convention in Vegas next year, with actual marketing to real companies that might find a use for this blockchain.
In other words - I’ll do what most of these leeches refuse to do or don’t know how to do. I’m just a nice guy like that.
RE: Why aren't more of the top witnesses running/supporting full nodes?