Only If they want to sell , the offer will be good for a longer period of time. This type of offer infers they want quick action. Here today, gone tomorrow. Too good to be true is usually just that. If it sounds unbelievable, it probably is.
Contests Read the fine print.
Most contest scams are dubious but not criminal. If you read the fine print you realize what you think you won, really isn't. Most contests have a big IF somewhere in the wording. This is always a clue to something amiss. Businesses love advertising and repeat customers.