They seem to do this during the biggest
sportsbetting times of the year. This is what
sportsbooks call March Madness time with college basketball. With all the games that are involved sportsbooks take more bets on this tourney then the do on the Superbowl.
OddsMaker Sportsbook does not do this pressure type sales all year around just a few times a year, i think it's a pain in the butt as well but they are on of the top sportsbooks out there and do pay customers in a timely matter.
Tony