I use myself this https://www.clickworker.com/en/clickworker?utm_source=1475803&utm_campaign=CW4CW&utm_medium=email
Yes, it is spam some could say, I will get 5eur if you earn 10 but can make a few 100 a week for some hours a day, varies how much work there is think I use 2-3 hours a day on average.