Asking so little of users is not always possible, though; you’ll often need to offer users an incentive. The best way to do this is to create a double-sided incentive, that is, one that offers something to both the sender and the recipient. If you have a high payload, you may not need as compelling an incentive in order to get good results because even a fairly small percentage of responses will add up nicely. But if your payload is low, you’re likely going to need a more compelling incentive, for both parties, to drive up your conversion rate and frequency.