I think the real way to equalize OSS software is to make it partially OSS ... maybe any company w/ < 10 mill profits it's FOSS, any company over that has to pay in man-hours (contributions) or $$ to use the product.
Amazon/FB/Microsoft and other Faang's could easily reproduce any oss software to meet their needs using their own staff...
Maybe even just have a github like site to host software and each organization pays based on their value, w/ startups/small companies under 10 million annual revenues essentially having free access.
Larger companies would pay a per employee fee, that fee would be divided up among all FOSS software that company uses. They could get some refunds for any contributions accepted to FOSS. It'd basically be like patreon for software in a semi-walled garden.
Small members could also 'opt-in' to pay $x per month that would also be divided up among other OSS projects. Either random, or they could pick by grouped projects or just pick their favorites to receive a % of their monthly donation.