I think those are the sports that you go back to normal life and can make a normal living at, like the same salary as if you were working a normal job but not the salary you could make if you were a tennis or basketball player or some other mainstream sport.
and before all the comments start to come in, yes tennis is a mainstream sport assholes
heh im actually from canada, just german roots. But tennis is very big overseas as well (im sure most remember Boris Becker), especially so in England.
Im gonna change my flag to Canada, ppl keep PMing me in german