So how long would it take you to sign your name 10,000 times? Even if your name was just a long string of squiggles, I imagine it would still take a good long while.
Barry Windsor-Smith could tell you how long it takes, since he did it for Dynamic Forces. There were a number of signed Ultraverse books that went into the thousands, but this is the king of them all. Not surprisingly it is fairly common on eBay, but it usually sells for a few bucks. For his sake, I hope somebody else had to do the numbering because that looks like it was a bigger pain than the signatures.
I asked BWS to sign a couple of books and cards at a con a few years back. He signed the books with the squiggle, but he initialed the cards “BWS.” Squiggles aside, the man has very nice handwriting.