You can't compare Womens college basketball to the WNBA. They have 2 entirely different markets. The colleges/students themselves are the market and are engaged in that game. College sports in general are geared towards the students, alumni, then the boosters/Vegas.
I also understand for women to not want to have to travel overseas to play professionally, when they have a capable professional league here. The NBA did try everything to generate more revenue for the WNBA, including sponsorships, ads on courts & jerseys...however, they are still doing a shytty job of promoting it.
They have to do more cross promotion - more commercials & ads, promos with both leagues. They have to involve the WNBA more during All-Star Weekend (the shooting drills, the 3-on-3s etc). They have to push their superstars - get them back into movies/TV shows.
For those saying they need to shut the league down, they can do the same with the G-League. They also operate at a loss, and I serious doubt they bring in any revenue.