Those features drive use but did they also increase profit, given that Facebook successfully enshitified their main product (the news feed)?

I don't disagree with your main point, though: Facebook certainly developed lots of new features, whereas Twitter pretty much stood still.

> Those features drive use but did they also increase profit, given that Facebook successfully enshitified their main product (the news feed)?

I don't have any insight into groups, but I do into Marketplace where yes it absolutely did.

I'd be astonished if Pages didn't have a measurable effect too since they are one of the main ways brands (which is a major source of FB revenue) interfaces with FB.