We contacted Soapbox Sample for a price quote via telephone, and they provided an estimate of US $23 per completed survey for 75 to 100 respondents, with a minimum payment of US $500 after we asked to limit the sample to pregnant smokers in the United States. At no additional cost, Soapbox assigned a project manager who oversaw the number of eligible and completed surveys each day. Soapbox rewarded participants for completing the survey in points that could later be cashed in for gift cards from various retailers. Participants received 2000 points (US $2.00 equivalent) for this survey.