This is a theoretical idea of a way to allow external companies to use steem users' blogs as media for advertisements.
This smart contract is independent of any blockchain. I think it's extremely necessary for steem users to figure out how to provide advertisers with an avenue into steem as a basis for the coin's economy, otherwise this economy is literally a ponzi scheme.
This post is a follow up to this excellent post by @ats-david
https://steemit.com/steemit/@ats-david/advertising-revenue-and-distributions-on-the-steem-blockchain
It seems people don't look at your post without a picture...
source: http://myraincheck.com/advertising