A similar bookmarking service that's been around for a long time is Pinboard
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.
I used pinboard happily, until i amassed enough bookmarks that filtering by a tag took upwards of 15 seconds to resolve..
So I built an open-source self-hosted site for my bookmarks now: