Congrats on the candy survey! I got a product test opportunity from a Samplicio.us survey today (crediting $1.10). The payment will be a Tango card as long as I follow instructions and return unused portion in prepaid envelope. I was surprised as it has been a while since I've seen a product test! The last one I completed was toothpaste last fall, making sure to return unused portion as required. Sure hope this is a sign of more product tests to come.That's interesting I have not seen testing requiring return of the un-used product before. But I guess the thought is they can see how much you used (but then what is to keep you from just dumping some out). Seems like an extra expense they do not need. But as long as we get what is promised guess it doesn't matter how they waste their money!
Understand your point. I was sharing an experience with product testing for a couple of reasons -- and I hope it's enlightening. First, sometimes you get to keep the product (allowing you to continue using it if you wish) after
you've taken the follow-up survey (you'll get your initial credit revoked in your FC account if you fail to follow directions). I had this happen to me on a shampoo product test so I learned the hard way. Oops.
My second reason aligns with your thinking about measuring the remaining product. I don't mean to hold myself out to be an expert on this, but in the case of the toothpaste test which required you to use it for such a short period of time, I wondered about this, too. Honestly, I didn't want to return it (but knew better). Plus, I want to be part of the solution rather than part of a problem.