It could very well be the single biggest one. In europe they'd probably need deals for each and every country. (Which require money and time.) The same would go

It could very well be the single biggest one. In europe they'd probably need deals for each and every country. (Which require money and time.) The same would go for the rest of the world. (Also, the farther away from American culture the less precise their classification base would get with regards to the local culture's. Think of Chinese music - which sounds atonal to a lot of westeners.)