I believe that even with SBD a critical point will still be visibility of the content, same as Steemit getting known and having people to read your content is key. Earning will still be related to visits, clicks and upvotes,
Do you think that this will change?
It is not really to do with volume actually, but more to do with who is upvoting you. You could only have one reader, but if that reader has 100,000 SP you could make $50 per post easily.
I do not think the way things are currently will change, as this is built in to the STEEM voting mechanism!