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No never, I could never read all that I've bookmarked. It's purely there so that if I have a problem and I vaguely remember that I came across a solution that there's half a chance I can search for it in my bookmarks and find it. It does serve a use on occasion - I typically star a bookmark that I came back to. I've starred 74 out of the 10000 bookmarks that I've got. But I've been bookmarking for 10 years and only '…
You are confirming that you don't use the bookmarked material as resources to solve your problems and recognize how challenging it would be if you were to do so. :) I gave up relying on starred repos as resources and just give them for recognition. I find repos just fine when I actually need them. I wrote a github star purge script that would blow your mind if you were to use it -- no more stars!
I use github stars in a similar fashion to you - just recognition. It's also kind of like Hansel and Gretel's breadcrumbs - it's just a note to say 'I was here' to myself on the github repo.
I'm using pinboard stars differently though - it actively means that I've come back to that resource, it would be as if you could give a gold star to a github repo if you actually downloaded the code. I guess you could fork it, but I only fork something if I want to make changes rather than just use it.