Treasure Trooper was one of the first survey sites and to date it it has almost a million members, so you know its trustworthy. One of the perks of Treasure Trooper is that you can be paid by check or paypal. There are many free offers, around 150, and there are a lot of extras. By extras I mean every time you complete an offer you earn gems, these gems can be used to buy referrals, gift cards, and more.
One of the standout features is that they have a guild. With Treasure Trooper's guild feature you can join up with a group (or lead your own) and compete against other guilds in different categories for cash prizes. If your guild wins in each category, each member will receive an additional $50.
Treasure Trooper also has a great referral system. You earn 20% of what your referrals make and 5% of what their referrals make.
Twice a month Treasure Trooper sends out a newsletter which contain secrets ways to make money that are only for the users who read them. They are actually interesting, contain a comic, and some news about the site. There is also a monthly jackpot feature. For each person who enters the contest, Treasure Trooper adds 50 cents to the pot. At the end of the month, they draw a name and that user wins the whole pot.
Payments will be processed on the 15th-20th of every month for the previous month's earnings. This means that you will receive a monthly payment if your balance exceeds $20. If not, then your balance will be carried over to the next month.
Overall a great site to make some extra cash. They also have a forum with great moderators and members there to answer your question 24/7.