STEEM is an eyeball economy like the Internet is. People and companies always pay for an attention and exposure. Businesses but ads to reach their audience bloggers often come to promotion botnets on Instagram and Twitter.

In STEEM we do it blockchain-way, more simple and transparent. And you're right, it builds incentive to own and invest in STEEM. Also you invest in liquid STEEM/SBD and get part of your money back in long-term SP - that's a brilliant idea actually. And on the other side of the equation you could invest directly into SP and rent your voting power.

Thus we have a functional economy providing we have enough active eyeballs to "sell".

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P.P.S. voted for visibility