My understanding is that family movies make TONS more money in sales, by comparison, after the white hot release period.
People are much more likely to gift Narnia related materials, than Brokeback Mountain.
On average PG-13 movies are the sweet spot and R movies are actually lowest in revenue. But there’s a lot of extenuating circumstances that effect that, not the least of which being that pretty much the entire arthouse subsection of “Hollywood” releases are R rated never wind up on more than 1000 screens in their entire run and will gross less than 10 million dollars. But you know what they say about past performance and the future, just because in general PG movies make more money doesn’t mean a given PG movie will make money. A $24 million opening weekend for a movie with a $155 million budget is very bad. Again it might all get saved by foreign box office where it appears to be killing.
As for gifts, there don’t seem to be much for Narnia, Tron on the other hand...