Depends what you mean by advertising. If steemit INC decides to display banner adds down the side of the page, we can always use busy.org or some other interface/site.
If I drop one of these at the end of each post;
There's not a lot anyone can or should do to stop me, beyond unfollowing and/or muting.
Maybe Coke is paying me, maybe I really love Coke.
When advertising does arrive, I think it'll look a lot like this.
@mattclarke you are right, not much we could do about banner ads. I'd like to discuss more.....but I'm felling....so.....thirsty....