3 days in a row, I start betting tennis matches at several books, including BetOnline. About half way through, Betonline takes down almost all of their tennis matches. Their prices aren't off market or anything, but it prevents me from betting them (with my already reduced limits).
This has to be one of the most ridiculous countermeasures I have ever seen a book use. If you're going to deal a 16-cent line and want to play with the sharps, you have to take the bets.