The difference between RG and songmeanings, and really any other lyrics website in existence, is the quality of the annotations. My habit of listening to rap has changed quite dramatically since I have discovered RG - I don't have to speculate about what a line might mean, because now there's a whole community of people who love rap collate their collective wisdom and tell you what it means. The verified annotations are also amazing...I mean seriously, what other site has artists themselves explaining what they meant for their own songs? I think the $15 million can be justified if you look at their long-term plans. They've built a model with rap and now they're expanding onto rock, pop and poetry. I see it this way: the sell for RG is for their whole slew of websites to become the wikipedia for literary/artistic interpretation, a position they have already locked down with rap. Whether that is worth $15 million is of course up to you, but it looks like it was worth it to some big name investors.