Maybe that is what we do not understand.

Agreed, it's not in perfect condition. However, according to the US Chip Guide, there are fewer than 15 of the 10¢ chips from THE PIT and fewer than 250 total chips from The Pit know to exist.

Isn't it better to have a poor quality chip than no chip at all? We would think that having one of 15 (even if it is in the poorest condition of all the chips) is much better than no chip at all?