Those that didn't sell bought into the company hence the reason that of the 100k created only 100 are currently available on the auction
By the way, nobody is buying those as far as I can see... so perhaps the reason for the "only 100" is lack of demand? Occam's razor says that some poor schmuck keeps relisting, others just don't bother.
Of course the uber-transparent ionomy site doesn't list atom trade history. Go figure.