going through some old browser tabs on a computer i don't use much anymore & the amount of link rot just over the course of a few months is pretty wild tbh. and a pretty big chunk of the dead ones are fediverse posts
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product listings are probably the biggest category overall though. online marketplaces these days like to completely scrub finished listings from existence pretty fucking quickly rather than leaving them up for a while as sold/out of stock. which sucks a lot for research purposes
