Are survey incentives legal?
Survey incentives are completely legal, even in the B2B world. But there are requirements that differ by state and country, so make sure to check with a legal professional to verify that you aren't breaking any rules.
How much should survey incentive be?
How much should you pay? It depends on how long the survey is, how complicated it is, and how scarce the respondents are. But unless you're trying to survey doctors, high-level executives, or similar hard-to reach audiences, here are some good numbers to consider: $3, $7, $10, $15, or $20.