Why does an American title not matter like the uk rainbow belt or Euro belt?

[ryanman]

Just a point, I think you are referring to the Commonwealth belt rather than the British title (The Lonsdale belt) when you say the rainbow belt. The Commonwealth title is much less valued than the British title.
The British title does have value, but many fights for it pass by without much coverage outside the boxing hardcore. Only when it's two of the bigger domestic names does it get some wider exposure.

Here is Billy Joe Saunders with the Lonsdale belt and the Commonwealth belt.

billyjoe.jpg

Argh I can't add pictures properly now.