Like http://www.bigspot.com?
Can I really get paid?
Does it cost any money to start?
Are they a scam?

Bigspot.com may or may not be a scam but there are legit survey sites out there, keep in mind none of them are going to make ur rich $$$ but they can provide a little income here and there. Many will not pay out to you after you complete some surveys. Any that ask you to pay before hand are 9/10 times gonna be scams. Some legit ones are in order of my preference;

http://mindfieldonline.com/referral/17dc345d
http://www1.pineconeresearch.com/
http://www.hotspex.com/

for any survey site its best to register completely and fill out any registration surveys they give u this will make it so you'll get more surveys sent.

Source(s):
http://www.surveypolice.com