Did you know that there is no free lunch?
The price for these "free credits" is the valuable time of your life. They pay low rates, mowing lawns may be payed higher. Frequently, they abort a survey with 5 crs compensation (only if you are lucky), and there are loads of reports that "offers" do not pay or need a complaint - extra time to spend. Save screenshots!
Your decision if this free lunch is worth the hustle or you - like me - value your lifetime higher.