Those numbers aren't based on anything tangible. It's a wild ass guess as to how much the teams would bring if they went up for sale. Total funny money.
It's not a matter of how much as a percentage of perceived value they should be paid. In any business, the amount paid has to be dictated by the amount of revenue and profits that are generated. WNBA loses WAAAAAY more money than it spends on salaries and operations. It's so far in the red it ain't even funny, the players salaries and operational cost (loses) are all covered by the NBA which owns 42%. The NBA just eats the loss to provide the league for fans and looks at it as just another expense.
That's what none of these players seems to understand and none of them have apparently ever taken a finance, economics, or accounting class. "Pay us what you owe us?" Literally no one owes you anything. You don't make your employee any money. In fact, your job loses money and is strictly in business just because if the NBA said it wasn't going to continue to subsidize your business at a loss, the political backlash from certain groups would end up costing them more in boycotts, etc. than it's worth.
WNBA players should feel lucky to be paid anything at all, because if not for the NBA covering their cash bleeding business model they wouldn't have careers as a pro basketball players.
I don't know where any of you are employed, but let me ask you this. If you work for a for-profit business, would you continue to have jobs if your employer didn't generate a single dollar of profit from it?
Yes, the NBA has billions of dollars, but no...you're not entitled to it. None of the billions in profit they have are generated by you. The $50 million in losses each year that your league causes however...those are in fact generated by your league. In no other business is a product with demand being orders of magnitude less that ROI going to stay alive.