I did my own counting of that panoramic shot, and it was about 100, but that was in one 'instance'. No doubt, people filed in throughout the day. If he spent a good minute with people, which he does spend quality time with signers, he would 'deplete' 100 in less than 2 hours. If he had a 4-6 hour sign period and multiple people signed as groups, most went shorter, some went longer...well who knows, but it could be well over 100 for the day. He could have 2-3 times that over the course of the day. Mind you, this is just guesswork and not fully-backed by the power of my spergery.