Freecash is probably one of the most popular websites and is also the most high paying. They offer many offerwalls and survey providers and they also host events. Right now there is a christmas event where you can spin a slot machine for free for every 1000 coins (1$) you earn. Om Freecash i have earned a total of 747.13$ and that is very good for my location since sweden doesn’t seem to popular for the offerwalls. In a different country you would probably earn much more!