Apple’s Billionth Song: A Legal Lottery?

Apple’s iTunes Music Store has been running a contest for a while now.  They’re counting down to one billion songs sold (and reached that mark recently).  In marketing this contest, Apple has been giving away prizes for every 100,000th song sold for the last few weeks, and had a $10,000 prize for the person who bought the one billionth song.

I can’t start a company whose business model is selling lottery tickets.  Governments won’t let private companies run lotteries.  At least, not in Canada.

But if I’m selling things, I can run a contest that gives a prize to the nth purchaser. 

Isn’t that about the same thing?