Ok cool. So RG is way better than songmeanings.

That doesn't change the size of the market.

That is, unless you think the quality or features are so good that it will increase the size of the market. In that sense, I don't think RG is groundbreaking enough IMO.

Songmeanings has been around for over a decade. If the market demand was really there ($15mm investment worth), they would naturally gotten some funding, or enough revenue, to improve their product and soak the $ potential out of the market.