We used to get 4 sets of magazines, plus 2 study editions. Normally I threw away 4 sets of magazines. This occured after they accumulated for several months. I would bury them in the trash, just in case any JW's stopped by and saw them.
Our congregation was periodically asked to take a count of how many we actually used and adjust our order downward. It was obvious that the WTBTS was anxious about printing so many that weren't placed.