Each survey has some form of "incentive" involved. Some incentivize all respondents and some have drawings. In all instances the incentive is clearly spelled out in the survey invitation (payment method and payment timing).

If you would like to participate in Esearch.com surveys,it is strongly recommend you have a Paypal account for incentive payments. They are not able to make individual cash/check payments so they are making most all incentive payments through Paypal.com. The survey invitations are sporadic. However, when surveys it is almost guaranteed that you will get paid.