A couple years ago, when I was trying to make a little extra money, I joined a ton of survey groups that promised money for survey participation. I've maybe made $200 over the 2 years,but the products I've tested have been worth the effort. I've received, laundry detergent as well as liquid fabric softener (which I had never used before trying it. I'm a dryer sheet kinda gal). I've received several packages of diapers, baby wipes, tissues, dish soap, kids shampoo/conditioner.
My favorite was the crystal light peach tea trial. They sent 2 full containers (3 packs each) of crystal light and wanted to know which I preferred. I am now hooked and ALWAYS have peach tea on hand.
If you are interested in making a little extra money and testing products, let me know and I will get you a list of the top companies I have worked for.