In preview mode, the right-click context menu only applies to a selection - you can’t right click on a link (as you can in a web-browser) to copy it. Moreover, it only copies text, not a formatted hyperlink. So, you are forced to switch the page you are reading in Preview mode to Edit mode, highlight the link, and copy/paste to the scratchpad. Very cumbersome.
I suppose there’s a few more feature requests in here - right click unselected links, copy link rather than text… I will try out your idea of using the [[autosuggest feature. Perhaps it’ll be more efficient. But I think both a proper Scratchpad starred files would be eventually useful.
However, your scratchpad seems to be a reasonable workaround to another of my feature requests - to have a Roam-like, infinitely scrollable sidebar that you can drag/add reference material to. Opening the full notes as panes, as some have suggested and I’ve been doing, ends up being cluttered and unusable.