There are billions of dollars being left on the table, unclaimed for when Steemit.com does not utilize its platform for advertisement. Why?

I simply think that Steemit.com doesn't really need investors more than it needs to start its own advertising service. Allow people to advertise their amazon businesses or any kinds of businesses on the steemit platform. There is billions dollars worth to make out of simply advertising. Why not? Once steemit does this, bam! All problems solved.