I have done quite research about link pyramid. I decided to try this strategy to my link building strategy for my company. There are few still I still don't quite understand about link pyramid. First, what is the benefit of link pyramid? Isn't simpler to build do-follow backlink to the money site instead of building them in different tiers? Second, what keyword I should use for tier 2, tier 3 and so on. Is it any keyword will do as their purpose is to pass authority/link juice to the tier 1? Or I should focus on variation of my main keywords? Is doing random keywords break the purpose of link pyramid?