it's important to remember that e-rewards provides member criteria to the groups that actually run the surveys, but the survey groups don't necessarily adhere to those criteria. in fact, i strongly suspect that the biggest source of fraud for e-rewards comes from surveys that collect the information they want and then disqualify you.

from what i've heard here and other places, e-rewards is good about giving credit for surveys that collect full responses and then claim disqualification. i certainly hope they keep track of the worst offenders and don't let them host surveys again.