Thanks, great to hear! Still working on the Pro Version. Planned features include for example the creation of HTML snapshots (to also still have the links available after a page gets deleted), priority rendering (when the queue is full pro users will get priority) and some additional views and functionality. But that will evolve over time.
What I am also very excited about is the possibility that people will be able to create own plugins which extend the possibilities of link.fish. Already now all the views on link.fish are built as plugins. That plugins could add custom views for specific use-cases (like for example a spreadsheet view of the entries or mind map style for tags) or additional functionality (like voting on links).