i-Say surveys is a one of the nicest survey companies. Again, you should not expect to become a millionaire, but i-Say is one of the survey companies that should be in your collection (among others, of course). I-Say survey invitations arrive every couple of weeks and usually they promise payment. Another advantage is the use of PayPal. This way, there is no need to wait until you reach a certain amount before you are paid.
Bottom line:
Frequency of surveys: once in a couple of days
Average pay for survey: $5
Remarks: nice but slow way to make money online.