

Paid surveys are a part of a broader field called “Market Research”.
When a certain corporation wants to get their target market's opinions,
shopping preferences, views and ideas, they order a consumer survey
(or a focus group) from a marketing research company.
In most cases, such surveys are being conducted when a company is planning to
launch a new product or interested in improving an existing one.
They need to know what their potential customers think, feel, love or hate
about their product or about their brand and this customer feedback is
essential to them.
You
apply to be a participant via the marketing research company's
website (by filling out a screening questionnaire with your demographic
data).
After
they examine your questionnaire, you will receive a confirmation
email, telling you if you've been accepted or not.
If you
qualified, you'll start accepting survey participation invitations via email
with a link to the relevant survey (some companies require installing a
special survey-taking software).
You take
market surveys, answering questions about products and services.
You are
paid for the surveys you completed the previous month.

It depends on the length of the survey and the
time it takes to complete it.
Sometimes, it may also depend on the requested target audience profile.
Companies can order research surveys based on demographic parameters such as
gender, age, marital status, geographic location, education level, housing
type, native language, ethnic background, income level and employment status.
When you join a survey service, you will be required to give the above
details, so they can send you surveys that match your individual profile as
well as the ordering company's needs.
Typically, short basic surveys, that don't take more than a couple of minutes
to fill out, can pay $3-$10 per survey.
The longer they get and the more time it takes to fill out the entire
questionnaire (some may require up to 30 minutes), the payout increases and
can reach $50-$75 per survey.
Usually, you're getting paid either by check or through Paypal.
Most companies send the payments once or twice per month
Here are a few examples of paid market research survey offers, to get you
started.
They will enable you to “test the waters” and see if this can work for you.
All the offers below are 100% totally free to join.
American Consumer Opinion
My Survey
Survey Savvy
Click IQ
E-Poll
Global Test Market