At the end of the day, there is not a single intellectually honest argument you can make for All In being the highest-attended wrestling event of all time.
I did genuinely believe it was for a little while there. The reason why it seemed plausible at first was that TK insisted that the 81k figure was the 'paid attendance', and the actual in-house figure including comps and event staff was somewhere up to 90k, which I thought meant that 81k was the genuine number, kind of like how you get the 'entertainment' number for big WWE shows, followed by the real number on investment calls. But once the turnstile number was revealed, it was pretty obvious that 81k was just a number TK pulled out of his ass to try and pretend he beat the record.
The 85k number can be quite safely ignored for the simple fact that if TK thought 85k was the genuine paid attendance, he would have announced that number.
Oh, and for the schizoids who are too stupid to understand basic concepts, paying for tickets and not attending does not make you a paid attendant. In order to attend, you need to attend, you morons.