1. If Google would penalize their own sites for link schemes (i.e. Chrome) done by third party agencies, certainly they should for Rap Genius. This isn't about whats the best site, this is about maintaining credibility in their index. The moment Google plays favorites manually is the moment I switch to another search engine.
2. Gaming SEO is attractive to almost everybody. Google needs to make it so painful to get caught, that people won't bother risking it in the future. The way I see it is...even if Googles algorithms havent caught up just yet to surface the best quality content, they will eventually, why not speed up the process of meeting them in the middle and focus on legit link acquisition and traffic acquisition strategies...
3. I have no opinions about Rap Genius or their founders, I think their actions deserve a massive penalty...let them run ppc for those long tail lyric lines, I doubt those clicks cost more than a nickel. Let them clean up their act, and go through the channels to request a reinclusion in the index.
The game is the game is a poor excuse. give me $15mm and a site like Rap Genius and I'll get it outranking everybody in the space in 9 months, with only legit strategies.