I fair few people are already doing this sort of thing. They generate no real content at all, but reap the rewards. I wonder how much the value of Steem depends on Steemit. If it got adopted as a payment method everywhere then that would drive demand and these scams would be even more lucrative. It's going to be interesting to see how this pans out in the next year or two. Some are saying that HF20 will make it easier to spam in bulk.