Opinion-Central.com is a website with marketing research purposes, its part of Insight Express Consumer Panel, which provides its subscribers with the research data obtained from surveys answered by Opinion-central.
com members. Subscription is completely free and surveys invitations are sent via email at least once a month, although members may take surveys at any time. Compensations for surveys are not usually offered, but it is however possible that a survey offers compensation for completion. Some of the membership benefits include testing of products before they are released into the market, as well as evaluating product ideas and concepts. Opinion-central.com seems to be very well done, although it may take a lot of good will for people to take surveys in spite of the lack of rewards offered. 
