I was offered a two-night stay in Vegas that was essentially free -- as long as I attended a 90-minute-maximum tour of a place that was selling timeshares. I thought that was a pretty good deal. I received this offer because I had an unused Casablanca Express (CBE) voucher for a trip to Big Bear.
Pros: makes a good gift to someone you don't like
Cons: dishonest, value is average only because it is FREE, inconvenient
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