Did you bloody read what Duff posted? He said they pay external companies to provide the data. He also said they're hiring. I can only imagine it's because the job would be 1. tedious so people quit and 2. the amount of matches books offer keeps growing so they need a wider coverage. pellumb then confirmed his friend does this. Sits in the stands and phones in the info.
How the hell do you think books get the scores the millisecond after a player serves a point for a non televised - as in no cameras are allowed at all - tennis match with 13 people in the stands in Istanbul? Jo Jo the Psychic? Why when a woman player starts going apeshit at her coach or the ump or Querrey starts hitting balls into the stands does their odds suddenly plummet even if they're the massive favourites? I knew they had to have an "in" somehow but I wasn't sure how it worked until Duff and pellumb confirmed it. Someone is there feeding the books the scores and info you festering mince pie.