Some call it secret shopping.
There are many kinds of surveys. Some start as low as $5 or nothing but a free burger. If you think that nobody would be interested in getting $5 or less you might be mistaken. There still is competition and there are always hungry people. Surveys cover anything from food, cell phones, companies, to IT. Just always read the fine print before you take up a survey and agree to the compensation. Think about the time involved. If it's worth your time and effort I would say I'd do it. But beware if it's too good to be true it's usually a scam such as big rewards or products give-away, unless you have participated in surveys done by the same survey company before, so you have a track record of their payment practices and reputability. Some survey companies don't want you to participate in too many surveys because of tax complications such as to have to give you a 1099 and all that if you're paid more than a certain amount. And somehow these survey companies have their own information circle or database where they can get information as to who they can use and are eligible for what kind of survey. Also beware of scams that go through the net wanting you to do money transfer surveys. Anything that requires you to put up money don't do it. I've done surveys of all kinds and would do them if the surveys are reasonable, worthwhile and legit.
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