What would be the ratio/probability of getting a giftcard would make you participate in a survey
1
vote
5 dollar gift card (1 in 5 chance)
10 dollar gift card (1 in 10 chance)
20 dollar gift card (1 in 20 chance)
30 dollar gift card (1 in 30 chance)
50 dollar gift card (1 in 60 chances)