The sweepstake is the most basic type of all gamification concepts; however, it has no gamification elements. But that doesn't make sweepstakes any less popular.
The conversion of a sweepstake is strongly related to the prize and the type and amount of data that the participant has to provide. Therefore, a sweepstake is mainly used for sampling and data collection about a broad audience.
This is the most chosen sweepstake because it is a plain and simple way to collect participant data quickly. The participant enters data in exchange for a prize or discount.
The participant reviews your product in exchange for a prize. Often this sweepstake is in combination with a code check to know for sure that someone has bought the product.
The participant shares your product on social media in exchange for a prize or discount. The participant will have a bigger chance of winning a prize for each share.