Yeah – I'm not even sure we can call it adversarial where there seems to be no signal for relevancy. I'm sure there are "good" reasons for not having one (where by "good" I mean "profitable") but oof it sucks (esp. relative to the much simpler Web2.0 organization of e.g. Reddit)
Excellently put.
To me, it seems that the problem is that tagging is adversarial in any system where spamming can be rewarded.