If i may asked what is the reason and aim of you conducting a survey ( For what purpose )
and how do you intend to pay each person $5 for answering correctly where there is no space for address submission, do you just intentionally wanna receive free data without payment?
Besides non would get exactly what you think could be the answers then at last what happened to those who submitted the survey?
but if indeed the information from you is correct, it would be a shame if there were no facilities provided for delivery, is this really only for collecting survey results?
I hope the op can provide an explanation as soon as possible.