I am working on a bookmark manager service, Topiqs, that to some extent solves your problem through it's natural workflow. It collects bookmarks into topics which makes relevant bookmarks easier to find and bookmark collections have different importance signals which will decide how they bubble through your feed. It also have bookmark discovery through people, category & blog sharing. Bookmarks as well as bookmark collections can be described and collections can be shared and even worked on together with other people. A Chrome plugin allows you to add urls from tabs directly into both your own collections or collections you work together with other people on or into an adhoc link bucket. Topiqs is about creating & rediscovery https://topiqs.online.