I disagree with Tone Vays on just about everything... but he might get this one right IF... and only IF Steem does not modify the business model to bring in money from ads. The Bitcoin cash coming from the exchanges is going to dry up at the rate awards are being given out, so there needs to be a revenue model on top of people investing in Steem. My two cents.
Even if Steem fails, it is still an eye opener and a game changer. Somebody will get it right if Steem drops the ball... just a matter of time.
Bringing in money from outside ads will not be necessary if verified businesses begin to invest time and money in the platform and the token.
That would be FAR more effective than simple ads and far more effective at building social/emotional bonds with potential customers or evangelists for your brand.