Surveys
Yep, when you hit the page wanting address and phone number, time to check out.
Use a throw away, such as Yahoo email, works just fine.
Say yes to the ones that want an email, most never even ask. Most of the time you won't get the survey, but you end up with 5 credits. Tell it no and you won't get the 5.
Probably getting at least some combination of 75, 90, or 120 every day, plus the 5's.
Have found the ones such as this insurance 1 or a number of others that act the same way, you will never get anything, even if it says you completed it. You will learn which ones work and which don't.