I'd never use something like that as gospel. They may not be completely accurate and really miss thing like you describe, but they look to be generally accurate on the top 20 rankings. The numbers seemed good enough for the point I was trying to make... The top two teams in Spain, top team in Germany, top two or so in Italy and top four in England all pay a ton and make the majority of CL finalists. Also, they were also the easiest for me to find.