The given statement, "Concert promoters still sometimes hire persons to count or photograph how many persons enter a venue or fill the seats inside in order to make their own estimate of ticket sales to compare with counts from the venue" is TRUE .
Explanation:
Concert promoters plan and host live music concerts, taking good care of everything from the setting of the price of tickets and the promotion of performances.
Fan customs differ depending on the city. Many fans will buy tickets within a few days or even allow walking on the same day that a concert is performed.
It can be difficult later to track payments to tickets sold for money, therefore an audience will always be undercounting.
In these cases, the venue might shorten the developer or the promoter might shorten the artist. In order to generate a separate crowd size estimate, some developers place hired people at the main gate of the event to count the public as they stream or photograph the crowd in their seats.