Sweepstakes, Contests or instant winner games

The main difference in Probability vs. Instant Win games is that in an unmodified Probability game, every game piece has the chance of being a winner , therefore your exposure is theoretically unlimited. Of course, the odds will serve to control the number of winners, but nevertheless, the potential for multiple winners, and therefore the need for multiple pay-offs , exists. That’s why many of our clients elect to obtain prize insurance on this type of promotion. An additional problem with Probability Games is that if there are not enough versions of the game, people can figure out the pattern needed to win, therefore totally skewing the odds.

In an Instant Win Game, only a specific number of winning game pieces are created, therefore your maximum liability is controlled, and so is your pay-out exposure. By the way, prize insurance is often a good idea in this tactic as well.
Properly executed, both tactics are promotionally effective, but, because of the control factor, I think Instant Win games carry less risk, and I greatly prefer them to unmodified Probability Games. If your stuck on the idea of running a probability game, I would recommend modifying it so that every game piece doesn't have the chance of be ing a Grand Prize winner. Give me a call or include your email in the text of your response and I'll be glad to discuss ways of modifying a Probability Game with you.
The most important thing to remember in either an Instant Win or a Probability Game is to be sure your Games Administrator has a lot of experience running these types of games.

As long as they are subscribers as of the start date of the promotion, the consideration took place prior to and not in response to the sweepstakes offer and hence is legal.

This is a rather broad question, and the answer will change from agency to agency, and possibly even promotion to promotion. I checked with Rich Kaback, DJA's Vice President of Travel & Incentives , to see how wwe would handle such a request, and here's Rich's answer:
"We frequently receive and gladly handle requests for extensions, particularly when the sweepstakes travel award is to a distant destination, but only offered for a limited duration. We engage the winner in a dialogue to determine whether they would like to extend, and clarify that we can make changes to the flight itinerary, so long as the original airfare is not exceeded. We then advise the applicable airfare cost and make every effort to rebook without any increase in airfare, or alternatively offer the winner the opportunity to subsidize the difference, in the event of an increase. We also gladly assist with land arrangements (hotel reservations, car rental, etc. - whatever is required.) However, just to insure that the accounting is crystal clear and unclouded, we typically maintain our original reservation, which we prepay in full, and then create a new, secondary reservation for any extension arrangements, which we cover with the winner's credit card. Sometimes, if the winner extends at the same hotel, we confirm a similar type of room accommodation, but with a separate confirmation number, and clarify this information to the winner in the letter which accompanies the final documents, advising that the winner should, at check-in, request that the same room be maintained or assigned to both bookings."