It is not true.
However, I was the literature servant in my congregation for more years then I would like to remember. I can tell you that:
Certain high dollar items have a manufacturer's suggested donation price. Our Congregation Coordinator (over whatever they are called) had stickers printed to put on these items to remind the person who ordered them about the donation process and to considered what such an item would cost if purchased at a retail store. So, guilt was often used to motivate a certain amount for donation.
In addition, the Service Overseer or Secretary would review the monthly order form. High dollar items may be reduced from the order amount. In addition, you might order 10 of one particular item and only receive 2 in your shipment with a footnote that says the ran out.