For the Reddit platform, we spent US $122.67 on Reddit ads, running a total of 9 ad campaigns on 4 subreddits that received a total of 146,885 impressions and 350 clicks. We received 178 completed responses, 95 of which received a US $10 e-gift card using Giftbit. Of the gift cards sent, 9 respondents accepted the gift but never used their reward. These respondents allowed the gift to expire and 1 respondent even canceled his or her gift. Therefore, we utilized US $850 of the US $950 spent on rewards. The average cost per completed survey was US $20.37.