This is a ridiculous question...the answer is that wherever there are users, there is money to be made. Spam techniques will always have a limited lifespan. Brand-building will always be able to thrive with sites like pinterest and instagram...because for as many spammers as there are, there will always be a good number of real users to click through and buy your products.
Build stores, not spam, and you will do fine.
Build stores, not spam, and you will do fine.