lol, nothing to do. Why does match fixing happen in the first place, because of people that gamble on sports, meaning bet on who would win and lose. Tennis organizers should never endorse such a thing, if a player is playing an event sponsored by a betting site not only sponsored by is main sponsor, they are also endorsing the product.
Your argument is based on principles (understandable ones) but having Bet-at-home Open change its name is not going to affect match fixing, is it? Bookmakers will always make money offering odds on tennis, it would be stupid of ATP and WTA not to take advantage.
You know that the chair umpires virtually set the odds for livebetting with some companies? Every time an umpire presses a button for a won point, he/she automatically updates scores and odds on bookmakers website.