I believe zacharycohn meant "regressive" as in "imposes a harsher burden on lower-income households than on households with higher incomes."[0] In this sense, Washington state does have a regressive tax system, in part thanks to 0% income tax and higher than average sales tax.
They’re cutting off third party apps to increase their control over the user experience, to show more ads.
The relationship with OpenAI might also be a thing, but I think it’s the ad numbers they need to juice for their IPO.