I don't think Reddit cares. People talk about well run subs as good things but reddit admins don't really see mods as curators they see them as janitors. They don't like it when mods curate subreddits they want up votes to be the only thing that matters.
I doubt askhistorians really has the numbers (the numbers the imaginary advertiser or investor demands) to do anything to fight back.
they need engagement! Not removed posts and comments! Clickbait and especially ragebait are number makers not these posts with 90 % removed comments.
$500 million is their current revenue so that would be impressive if they could double it just by charging Google and Microsoft.
So doubt they could make that much. Also they already have decades of data they got for free. How much will a bit of new data really change their models?
It all comeback to the fact that Reddit is shamefully unprofitable and everyone needs an exit strategy. A top 10 website that can't even make a billion dollars in revenue? Lol good luck selling that.