I can think of 3 "reasons"
1) They wanted the rank and file to spend that money on the food in the cafeteria/food stands
2) They wanted the rank and file to donate the money in the contribution boxes
3) They did not want children chomping on candy during the session getting paper on the floor
I can remember a brother giving a local needs talk about people eating candy and chewing gum during the meeting; that it was disturbing to the brothers on the stage to look and and see everyone chomping down, leaving used gum under the chairs, and candy wrappers on the floor.
Of course, there was no candy machine at the hall, but it was directed to the parents not to bring candy to the meetings, not to chew gum.
They couldn't empty the machines or move them, so the brothers in their wisdom, put up signs over them OUT OF ORDER. Reminds of their putting up paper over the mirrors in the women's restrooms thinking that was why they took so long....not thinking, twice as many women, no men taking children to the restroom, it takes longer to pull down your underwear and pantyhose, than to zip and flick.
*** km 7/86 p. 3 Not Neglecting the House of Our God ***
Each one should exercise neighbor love and be careful not to cause distractions. Whispering, eating, chewing and snapping gum, rattling candy wrappers, making unnecessary trips to the rest room, and habitually arriving late all interfere with others’ concentration and detract from the dignity due Jehovah’s place of worship. "Love . . . does not behave indecently," and such poor manners are out of place in the Kingdom Hall. (1 Cor. 13:4, 5; Gal. 6:10) Worldly meeting places are often unsightly and even damaged when people carelessly dispose of chewing gum, candy, and food. All of us, and especially parents of young children, should take care that we do not spoil Jehovah’s building in this way
Reasons why it will not be Paradise to be with 6.5 million JWs.
Blondie