Acop is One of the biggest survey sites. All registered members participate in a monthly drawing to win $250 in cash awards, just for being a member. If you participate in a survey (a longer questionnaire); you will always receive some type of incentive (a free product to test, cash, a check, or a gift). This is a big advantage because, as you will see, that not every survey company promise incentive for finishing a survey. Most of the companies use cash or prize drawings. Another advantage is "no bullshit" payment. you are really get paid to take online surveys, I received checks from them without having to wait until you reach a certain amount and other tricks some company use.