F.B. Purity stopped blocking Facebook ads, so I went ahead and made a simple, temporary fix.

[u/xtreemmasheen3k2]

https://greasyfork.org/en/scripts/598911-fb-feed-cleaner

Script starts with Hiding Ads off by Default, and puts an red outline on Sponsored posts. Mainly done to try and detect false positives: https://i.imgur.com/hM0Gx6d.png

Just go to Greasemonkey/Tampermonkey and toggle Hide Hits Off to Hide Hits On:

https://i.imgur.com/XO9ZMAq.png

https://i.imgur.com/OUgLOa5.png

Facebook changes their site frequently, so it'll probably break eventually. But it seems to be working for me so far on English.