A similar bookmarking service that's been around for a long time is Pinboard https://pinboard.in/
I was recently going to get a Pinboard subscription, but noticed the price doubled to $22/year. That's still a low price but at the same time I don't see obvious benefits over services I can use for free. This appears to be specialized for developers, so at least after an initial glance, it might be worth $24/year. Plus it comes with a six month trial.
Paying for a bookmark archive should be considered a feature, an archive with no sustainable business model is less of an archive and more like a black hole.
Partly because of that I also subscribe to Pinboards optional archiving of the actual pages bookmarked, so that even if they disappear from the internet I still have a copy from the day I bookmarked it.