Have to agree with Carpking. As a tester you are just that, a tester. You are given a bait untried, untested to go and
try to catch carp. Your results and oppinions are used to perfect the bait. If the bait company has given you a bait where the attracters or aditives are too high the bait will be repellant and you will not catch. The company will then make adjustments, give you another load of bait and you try again. Once again you give your feedback to the company and the bait is further developed. Up to this point you may still not have caught any fish on your free bait. Once the bait is right and you start to catch effectivley, then you may get in the mags, unless ofcourse they then give the perfected bait to one of their more high profile anglers to promote
So you and other field testers have done your job, the next step is to do it all over again because there is another new bait to test. The bait may be free but you may well spend most of your season not catching
If you need confidence in your bait then field testing is not for you (or me) thats why we have to pay for it

and those prepaired to take the risks get it for free