I would count poly women having more partners than poly men as evidence in favor of gender ratios mattering. It suggests poly women are in higher demand than poly men. It's possible poly men are less willing to be poly than poly women (therefore poly men are lower supply and poly women higher supply), but that doesn't go too well with my prior of men generally desiring sex more than women on average.

On 3, yes, if the OP is a 10 because of his writing, or any other combination of factors, then he'll be in high demand irregardless of the imbalance, but it's not clear that the OP would be considered at the top of the pack by other women.