Agreed. 3 sharing features should be implemented, even if they're just "view only":

1) Create public (or at least: shareable) collections, and share them either by sharing a link, or by directly inviting someone to view it by email. This should be similar to how you can share Google Drive documents.

2) Allow chatting with the collection (via AI) to "view only" invitees to the limits of my subscription plan.

3) Share URLs with my sticky notes on them.