It has been said many times. First, the players are the customers. Second, players do not like hitting bad balls (the reason for change to the Pro M is because they found it performs more consistently regardless of weather, as opposed the Classic M that was a pillow in the heat and humidity and a Stadium at 55-60*). So USSSA decided to give a more consistent ball and raise the compression threshold from 220 to 240. The issue with the "220" bats were that most started 250+, but quickly dropped to 220 or lower. The 240 bats are engineered to drop to 240 and stay there for a period of time. At the end of the day, you can say it isn't about safety, but the end result is that it will be safer than a 220 bat.