Paid surveys?

In the last few months, I have been bombarded daily by emails to participate in paid surveys for various market research firms. Some also invite me to review a certain number of charts./cases. These are all heme-onc based. As a poor fellow, if someone offers me >$100 to do something like this they at least have my attention. Anyone have experience with these? I haven't even gone through the screening questions on one to know if I could do it.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Hematology / Oncology Source Type: forums