That seems to be the biggest problem right now. With labor negotiations on the horizon, the NBA seems to actively be sabotaging the WNBA.
I suspect that the NBA wants the league around for optics but they don't care if it succeeds or not and they are certainly aren't interested in investing more now in the hopes of future returns. There is an argument that if the NBA really got behind the WNBA and pushed it that the WNBA could be more successful. We will never know because they don't care enough to make that investment.