Its great update. I've been using raindrop.io since the first launch !!!

Warn users when adding a duplicate bookmark. This would show them where that link already exists, saving time from duplicate cleanup later on.

There are many people, like me, who prefer not to be on a monthly / annual subscription, but pay once for life. So a kind of lifetime license for pro versions.

This feature request about notes attached to bookmarks only! Be sure that I'm not talking about separate notes. I do not plan to compete with note taking apps. There so many great ones already. I don't want to invest so much time to compete with them. I don't want to shift focus from main thing - bookmarks. Good products make one thing, but do it great.

Reminders for saved items.

Multi Authentication with Google Authenticator to safely access public PCs too because even if a public PC is infected with virus, they wont be able to login into account unless they type in 2nd authenticator access code.

In this time, I am on the horns of a dilemma cause I want to add my bookmarks into multiple collections without duplicate them. I'd like that feature as soon as possible =)

parent & children tags to form a more useful taxonomy

It would be nice to archive read bookmarks, so we can track what was read and what's on the reading list.

Like "Smart playlists" in iTunes. You create conditions (topic, title/description/text contains string, multiple tags, type, date..etc...) and all bookmarks automatically puts to specified collection.