Twelve weeks go by and a bonus doesn't post. So I send in an email
with all the details. I get one of those frustrating responses, that has my
email attached, and says "Please send us your frequent flyer number." The
number was in the message already. But I comply.

Now four weeks later, my bonus has posted threefold. Previously a similar situation has resulted in double miles. The first time I pointed it out,
and they didn't do anything. Two other times I didn't bother. I'd be
interested in the view of flyertalkers how to approach this.

1. Should I take the extra bonus as goodwill points for their mistake and let it ride?
2. Should I point out the extra miles mistake to them on the grounds that if the mistake was the other way, I'd still be bugging them?
3. Should I donate the points, or an equivalent number, to charity somehow?
4. Something else?

Thanks