Since I started researching ways to make money online last August, I've definitely made the most money through Rev.com. It's not something you can do while watching TV, unlike some other mindless survey sites, but it does make you money. $875.85 so far, to be exact.
Pro Tip: If you are living outside of the U.S., you might need to use a VPN to pretend that you don't. I've been messaged by people who said they had their accounts cancelled for living in the Philippines. I was able to re-sign them up, and I think that might be because I live mainland.
I actually wrote a review about this on my website http://leave.today/rev-com-review/ if anyone is interested in hearing about my tips and tricks. :)