I actually attended one of these double header games last weekend. The crowds were extremely thin for both games. Their were maybe 75-100 people in the stands.
So how many know about the World Cup of Softball which is doing the same? Currently sitting in Aus watching Japan vs Canada. (Waiting for Australia's game next then bed) Next week is world champs.
Attended the Softball World Cup when it played in SoCal a couple of years ago. It was pretty cool. The players signed autograph after the games. It had decent attendance but was also during the same time as many tournaments.
We follow the team via GameChanger.