Update: Just got an invite to sample Trusource Protein!
Join Swaggable for FREE Samples! Swaggable is a great site that sends you free samples in exchange for a writing reviews. After you have signed up, Swaggable will send you an email when they have a sample they think you’d be interested in. They will mail you a sample free of charge! Make sure you leave a review after you’ve tried it because they won’t send you anymore samples unless you have written a review.
I have got quite a few samples from them so far like dog food, lotion, beauty products,etc!