I like MyPoints for ease of use: they come to you. Easy for newbies.
I like Creations Rewards for shopping and just in general. They took me a long time to get going with them, but love them now.
Lucky Points seems really great. Easy to do, but you to have to go to them; they add up quickly and I like the rewards.
Memolink is easy and quick, but not real reliable about pay: it just takes a long time!
Reward TV is time consumming, but worth it if you have the time. It's possible to earn $5 - $10 a week with them. If you are interested let me know. There is other information you will need.
I do Milesource and Blink, but will probably stop as soon as I reach my current goals, neither pay quickly and time consumming.
Good luck! If you have questions, this is the place.
Lori