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.
Global Test Market is a decent standard of what you're getting yourself involved in. Their practices are not any more or less shady or reputable than almost any online venue – survey or otherwise. Just like Facebook, when you identify yourself accurately with Global Test Market, you can expect them to use that information in any way possible to make a penny. The great news is they inform you and ask for consent first.
If you are looking for highest paying surveys, then you must join Harris Poll Online survey panel. Harris Poll Online is a well known market research company and has been in business for more than 50 years. Once you join Harris Poll Online you will have opportunity to participate in paid online surveys, focus group studies and paid product testing opportunities.