depends on how big the marketplace is grown or what time of advertising model. there's been many a startup in the tech space that raised billions in value before having a clear value proposition - and Steemit DOES have some significant strengths and potential over them.

MANY potential applications could be built on the blockchain. 'tis up to the creativity of the community as to what will be built.

so there will come a point, yes, where that potential needs to be actualized and more streams of revenue generated...