While surveys vary widely in how they are conducted and used, there are a number of components that are common across nearly all surveys. Many of these common features have been studied in extensive detail by survey methodologists, psychologists, statisticians, and many other fields of research. The general process of survey research is outlined in the figure below.
This is where it can all go downhill quickly.  In the pressure to make as many pennies out of a nickel, a lot of research corporations will not just sell your answers but the data associated with it.  Details that you provide when taking paid surveys such as your name, address, age range can all be attached together quickly to fulfill a lot of larger companies' requests for information (RFI).

Avoiding scams online is pretty easy once you’ve become familiar with how false ads work and have developed realistic expectation about how much money you can make for the time you spend. On the surface, making money taking paid online surveys may seem like a long shot, but it certainly is possible and many people enjoy the benefits of taking part in them. So don’t be afraid! If you want to try it, read some of our reviews and sign up for the ones that look interesting to you!
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Watching video ads: Video ads certainly aren't uncommon in the online world. While generally they're a hassle getting in the way of the content you want to watch, many paid survey sites have turned them into a way for members to make money. It's pretty easy to make a tab, set a playlist of paid ads going, mute it, and carry on with browsing the internet or taking surveys.

Ipsos are a globally respected name when it comes to opinion polls and market research, and by taking part in their surveys you can help them gain the vital information that helps them make business, consumer and political predictions. Unlike many of the other sites to feature in our Survey Cool 2018 top twenty it focuses solely and purely on offering surveys. It also means you won’t be distracted by video watching and game playing that typically pays a lot less. Here is a detailed review of Ipsos I-Say.
First, thank you for providing this extensive list. I wanted to offer a quick follow up. After reading your post I decided to give Survey Junkie a try and I’ve already closed the account. Yes, I can tell it’s well organized and it is definitely a user-friendly platform. The problems I experienced were first that not one of the surveys they emailed me about were available. I did, however, complete several surveys from the site itself and I found them to be lengthy – in itself, not a problem, but 3 out of 5 told me I didn’t qualify after I’d already invested 10 – 12 minutes filling out the forms. They got more than enough information from me to be useful which is an old and highly unethical trick in market research – which happens to be my background. All in all, it was a LOT of wasted time.
Velasquez says our information could be used for questionable studies or sold to health insurers, for example. Or it could be stolen, which is a risk with any website that stores personal data. Most of the information we gave away seemed harmless — our shopping habits and travel plans, for example. But information like your birthdate could be used with other stolen data to take your identity. So keep that in mind as you’re answering questions.
Design and pre-test questionnaires: Designing the questionnaire carefully and then pre-testing it before fielding it to your entire sample is crucial to getting data that are valid and reliable. For example, careful questionnaire design and pre-testing can help reduce the chance that respondents may interpret the meaning of questions differently. Future posts in this series will tackle these important steps in much greater detail.