> I think a better strategy is (1) your own domain and/or (2) a site on github with actual code to validate* your talents.
Possibly, but that's for programmers. There are more professions out there.
I just closed my account too. The help page said that my account would no longer be visible on LinkedIn, but after closing and logging out, I still get the "sign up to see the full profile" bait on visiting my old URL (search result from Google).