After I encountered several slightly different signatures I contacted a couple of the late Ed Roth's fan clubs. I was told that he got 50% of the cases and he autographed every one of those, and that he autographed about half the ones that were at the HR plus more at various times later.
Of course I dont know how many cases were made compared to the chips, but I would say that at least 3/4 of those Ive seen have been signed.