The top NBA players makes 35+ million/year and there are several of them
The top female basketball player might make 1.5 million including overseas(no salary cap)
I would say soccer has it a few percentage points better
(both men and women) share in team prize money which is not allocated to the stars. as it is in the pro leagues. The top men soccer players make even more than the top NBA players and the top women pro soccer players make less than the top wpmen's bball players from their pro teams. Still they all can make more with sponsorship, but the women soccer players need national team caps and World Cup exposure to really make significant dollars, which is not at all necessary for the men, although it can help.
Are they in proportion to the payout?
These are straight questions because you'd think popularity drives the advertising rates which drive the TV dollars which drive the payouts.
Are the stadiums full of spectators?
was about listed at 11K (and I doubt it was that big).
The big issue that is going to likely kill the US women's team complaint is that they collectively bargained for their payments. I doubt a court is going to let them off the hook for the poor deal they struck and tell them to negotiate a better deal next time.
The Women's World Cup brought in almost $73 million, of which the players got 13%. The 2010 men's World Cup in South Africa made almost $4 billion, of which 9% went to the players.
The men still pull the World Cup money wagon. The men's World Cup in Russia generated over $6 billion in revenue, with the participating teams sharing $400 million, less than 7% of revenue. Meanwhile, the Women's World Cup is expected to earn $131 million for the full four-year cycle 2019-22 and dole out $30 million to the participating teams.