With GPT sites, you get paid to complete offers and surveys. Never do trial offers because all they do is take your money and also you are not guaranteed to get the money for completing that offer. I have seen plenty of people have their credit cards charged from a trial offers they completed but did not get money for completing the offer.
GPT sites will only pay you once they get their money from the advertisers when you complete their offer. Sometimes advertisers do not pay for the work you did, so always stick with the free offers to make money. Here is a list of a way to complete offers and surveys to increase your revenue:
1. Never use your main email address because you will get spam emails. I like to use Gmail and Yahoo.
2. Clear your computer's cookies after every offer/survey so the advertisers think that you are a new consumer
3. Complete the full offer/survey
4. Click at least 3 silver offers at the end and then close it out
Also another great way to increase your revenue with GPT sites is to get active referrals. There are so many people out there looking for ways to make money online like, at home moms and dads, teens, grandparents, even people who already have a job but looking for ways to make extra money to supplement their current income. You can get referrals by blogging, posting in forums, telling friends and family. But it is better to tell them about the GPT site your a member with when first get your first paycheck. It will be easier for you to have the proof to show them you make money from that site.
So remember....stick to completing free offers. Also before I go, make sure you make payout because if you decided GPT sites are not right for you and you made some money but not enough to make payout, the GPT site has made a profit with you since they did not have to pay you for your work you already done.