That last report is actually kind of funny. Seems to me they are missing out on an opportunity if they don't have concessions open, though I suppose it's possible they won't (maybe just a matter of workers in short supply).
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However, I think I've observed the most obvious missed opportunity for VANOC sales:
They are selling colorful Vancouver 2010 lanyards EVERYWHERE. Lanyards are those little clip necklace things you wear around your neck for ski tags, name tags, id badges, etc. But you know what they aren't selling? The actual clear plastic sleeves to hold the tickets, which are larger than regular ski tags. They could make a mint if they sold official Vancouver 2010 ticket sleeves with Inukshuks or Olympic Rings embossed on them in some fashion.
That may sound superfluous at first, but remember the tickets not only get you into the events but are also your transportation passes for the day. Also, you're not supposed to fold or damage the bar-coded ticket in any fashion. And lastly, most visitors regard the tickets themselves as collectibles so want to protect them from wear and tear and the elements.
Since they are discouraging carrying bags of any type through security, it just seems like it would have been a good idea for them to have created and sold a light-weight, durable accessory for wearing and protecting your ticket all day.
A missed marketing opportunity

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P.S. If you go to a drug store, camera store, or business store selling plastic "Panoramic size" image storage sheets, they work perfectly. You just trim off the top few inches of the photograph storage pouch, punch a hole in the top part, and clip on one of the gazillion lanyards available around town.