Donation now if you can even find any.
Up until the Swaggart sales tax court decision(WT filed an amicus) there was a required donation for just the cost of production which was 25 cents for a magazine.
When it became voluntary there was a push to get donations by asking.
The newly released large print bible was "free" except tge announcement mentioned how "this Bible would cost well over a $100 In store"
There are people who will die at armageddon for lack of a quarter to learn the truth back then.!!!