I'm not knocking the idea but 1 would assume everything on your site is available by doing a little work. Researching all past results etc. Now, at 10$ or euros per month, you definitely save the consumer a lot of the legwork, so I agree that it is not too much to ask potential customers.
Will all sports be offered or only a couple?
What other sports are you thinking about? Research shows that basketball is the least random team sport. Soccer depends most on the context. Baseball, football and ice hockey are more random.
We are in discussion about the inclusion of tennis.
The Linepunter Team