BigL
Make sure you read the reimbursement guidelines for each of your shops. Many require you to make a purchase that will be reimbursed. However, you will have outstanding money out there. I would hate to see you run up credit cards, deplete your checking account, etc. Other shops are fee only. You will find that some of the surveys are easy and do not take up much time, others are tedious and complicated. I would suggest starting with Marketforce. You will see mixed reviews. I have had good experiences with them.
Oh, listen to whatever Flash says, she is the guru of this forum.