I'd do it at the very least for the same situations that Nintendo does it in:
- Big Nintendo software releases (to increase software sales)
- Holiday periods, because people giving gifts won't wait until January
- Wii Launches (China and Korea later this year), because... they just have to.
Regarding amounts, it's hard to decide and depends on too many factors which I won't pretend to know enough about.
My Mario Kart Wii friend code: 2707-1866-0957







