I see people talking about how pr-0 context rel will outrank high pr non context rel. If this is the case why don't we just makes tons and tons of context relevant blogs to backlink to the money site (of course blasting that tier as per usual/required)? I know this is common practice with web2.0s however web2.0s are very finite I've found and only really a one shot deal. You could make wordpress blogs indefinitely or at least moreso than web2.0s. So am I missing something here?