HiddenPimo:
I noticed that they sent this letter out just before Christmas.
I think the Watchtower knows that JW's are in a giving mood during this time of the year. Why?
Because they know JW's are sending out gifts just before Christmas so that they won't feel guilty about celebrating Christmas on the exact day.
JW's even send out birthday gifts just before or after the exact birth date, so that they will not feel guilty of celebrating the birthday.
It's just their way of celebrating without getting caught.
Petra!