I get 100% of all my sales through Facebook... as a small business owner social media is the lowest price entry point directly to your audience
Want to know the result? My money goes elsewhere.
Also any money invested in SEO, as in building good content vs. SEO "tricks", usually has a bigger payoff than paid advertising.
I've literally stopped my SEO efforts.. most are just price checking anyways, looking for 'the lowest price'... I tend to find building a relationship and educating my potential clients better than trying to get a sale from SEO window shoppers