Bookmark adding rules to save links based on regex or domain patterns in specific collections would be a nice to have, preferably with some sort of "globbing" of domains. For instance, twitter links from @ShitpostBot5000 ["https://twitter.com/ShitpostBot5000/*"] would only get put in a Twitter/Comedy collection, rather than a "one rule catches all" approach where all twitter links end up having to go in one place. It'd be a similar feature to one found in https://copiedapp.com/ that would work well in Raindrop.io.