You won't get rich doing these things but it's legitimate and you'll get paid in the end. For example, you get a penny for each email you click. You get a penny for a video stream. You can earn dollars for fulfilling offers but those aren't nearly as quick as reading an email. They are upfront in what you get paid so you can decide if it's worth it.
There’s a decent rate of surveys pinged your way as you can expect two or three emails a day inviting you to fill in particular questionnaires. In addition to this, there are freely offered surveys on their cleanly designed website each day which you can look through and decide if they take your fancy. Surveys on CashCrate are often outsourced to third parties though, so you can make more money on the survey side from other websites. Similarly they are known for passing your information on to other people, so to avoid the irritations of endless spam, make sure you set up a dedicated email address for your CashCrate account.
IOCS is a not-for-profit research organization that conducts studies and experiments on shopping-related behavior – things like how we, as consumers, evaluate products, how we make the buying decisions, etc. Although the focus is mostly on shopping related behavior, some of their experiments and studies include broader areas of marketing, psychology, and economics.