So I undrstand what needs to be built, why we build them and all that stuff .. However, what the hell do these monthly plans mean? I see lots of services charging $xxx per month to target 5 keywords .. If my site has 50 keywords, I need to pay 10x monthly? The reason I ask, is because I am building some sites around low competition, easy to rank keywords. Would it be a waste of money to buy such a service? Are they for more difficult keywords?