1. I have to admit it was more powerful in the old days. It has it's value (else we wouldn't sell it) but it takes a lot longer than it used to to get things indexed. For some links you may still need some indexing service. Though it's a one time payment and not much.2. Depends on your SEO strategy, but most customers do that.3. You mean submit facebook links instead of your money site? Well I guess there is not much of a difference.