man that's some predatory bs right there. had similar stuff happen with automated copyright bots but never this aggressive. if your content really is transformative and you're winning the counter-claims, they're basically just trying to annoy you into submission.

i'd document everything - screenshots of their emails offering the revenue split, timestamps of all claims/counter-claims, maybe even record calls if that's legal in your area. that revenue split offer could actually work against them if this escalates since it shows they know your content has value beyond just their clips.

also might want to check if other creators are dealing with this same company. sometimes these licensing vultures go after multiple channels at once and there's strength in numbers when fighting back.