Win up to $500 Nintendo Cash Tickets inside Kellogg's Products (Exp Apr.27,2010)

Has anyone spotted these? I just found it on the Kellogg Canada Site -You can also get tickets by mailing in a request. (See below) I wonder if anyone has ever done this and won?

Find $5 or $10 or $500 in Nintendo Game Cash inside specially marked packages of Kellogg's* cereals.
Look for the $5 or $10 coupon printed inside the box and use it towards purchase of any Nintendo product.
PLUS, one hundred, $500 winning tickets are also randomly inserted inside participating Kellogg's* cereal. You could win a $500 Nintendo Visa Gift Card, redeemable on any Nintendo product!

Where to Find it

No Purchase Entries  Write to:
Kellogg’s* Back to School Contest, P.O. Box 4099, Paris, ON, N3L 3W9 with an enclosed, self-addressed, stamped envelope and they'll send you back a  randomly selected coupon within 4 to 6 weeks after receiving your request. Limit one ticket request per household per day. All ticket requests must be postmarked no later than 11:59 pm (“EST”) on March 29, 2010 &  received by 11:59 pm (“EST”) April 16,2010.

These specially marked Kellogg's* cereals:
- Rice Krispies* cereal (525 g)
- Crispix* Krispies* cereal (350 g)
- Rice Krispies* Vanilla Flavour cereal (420 g)
- Rice Krispies* Cocoa Cereal (420 g)
- MultiGrain Krispies* cereal (385 g)
- Froot Loops* cereal (380 g)
- Kellogg's* Frosted Flakes* cereal (485 g)
- Corn Pops* cereal (345 g)
- Mini-Wheats* Original Frosted cereal (555 g)
- Mini-Wheats* Brown Sugar Flavour cereal (555 g)
- Mini-Wheats* Maple Flavour cereal (540 g)
- Mini-Wheats* Strawberry Flavour cereal (540 g)
- Mini-Wheats* Cinnamon Streusel Flavour cereal (540 g)
Official Rules:
Click here for Official Rules

Let me know if you spot these.