When this happens I think it puts guys uploading new things at a severe disadvantage. Instead of your new stuff going up one at a time, everything gets listed at once and people have to sort through pages upon pages of new things listed at the same time.
I had this happen on my last order when I listed 500 cards. I think a fair amount of my sales come from there initial addage to the site when people may just notice them and like the look.
I collect Randy Moss and Giannis Antetokounpo Autographs