More ladies go, more money to win. Two way street.
Very doubtful they would ever get good women's attendance. There are just not enough women who play the game that seriously. I've tried adding more money to women's fields with very limited success. Better to put the money into men's events and enlarge those fields. It makes more sense to me to offer bonus awards for the highest finishing women and just let them play in the open events.
They're doing good to get over 32 women in any tournament! No surprise they're getting 40 or so here.