Privacy: 5.0/5.0 – Swagbucks' privacy policy for its own site is excellent; they always tell you exactly how your info will be used. We have not personally received any spam through Swagbucks. As with most other survey sites, Swagbucks does contain links to other sites which may have different privacy policies, so you should be careful when visiting other sites.  You can read Swagbucks' privacy policy yourself here.

Surveys can be super quick and take just a few minutes to fill out, or require around 15 minutes of your time. Five minute surveys pay $0.50 and surveys range from $0.40 up to the higher – and rarer – ones at $10.Paying out by the usual methods, Crowdology does PayPal and also vouchers. Most importantly, the minimum reward threshold is low so when you’ve earned $8, you can cash it out, unlike other sites which make you wait until you have earned much more money. The site offers prize draws from time to time for things like cinema tickets and surveys can be expected weekly.
You’ll be able to cash out your points either through PayPal or with a gift card. Survey Junkie claims you can get your cash out instantly, but this isn’t necessarily true. In most cases, if you request a payout through PayPal and it can take up to 24 hours, but in most cases it is immediate. Compared to other sites out there, this is a huge advantage. Some companies and sites can make you wait several days or even weeks. Sign up for Survey Junkie HERE. 
When offered a grand promise for a seemingly small price, many more are likely to fall for it. Being human, the idea of paying very little for great return is incredibly enticing. This is the leading idea behind offers like “Earn $200 every day! Just $10 for access to our exclusive list of high paying surveys.”  When entering the arena of paid online surveys, it's important to be wary of any offer like this that seems too good to be true.
I don’t see PaidViewpoint on your list. I like using that site. I signed up for it on June 28, 2016, but I guess I forgot about the site and stopped using it on July 24, 2016 but had a total of $1.91. I started using it again on May 5, 2018, and I’m now up to $27.05 and have a trait score of 10, which is the highest. The surveys are easy and you don’t get disqualified. I mostly earn 10 cents, but once in awhile I earn some good money like 62 cents. It does take awhile to add up, but it’s free money.
Paid survey site companies invest billions of dollars into marketing research online.  They always want to find out more intricate details of a consumer's relationship with their product.  Whether it's a new television show or just an existing product line, companies like Disney, Samsung, and Sony go to great lengths to find out their ideal audiences.
In addition to filling out online surveys for money, you can get rewarded for other actions, too. Some of the best paid survey sites are ones that offer lots of ways to make extra money other than earning money for surveys you take! The most popular websites maintain their following not only by offering various types of incentives but also by providing plenty of different and engaging ways for members to earn money. The purpose of these offers is to turn you into a loyal and active member of their community.
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.
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