I'm a baker. If I make a new recipe for cookies and give them away to a food blogger before I taste them, and they taste like dogshit, I fully expect to see a post saying my baking tastes like trash. If they are great, I hope to see an article saying it's great. Not knowing which will show up online is the risk I take if I give them out blind. They may be getting "free" food, but that doesn't mean they owe me silence. They aren't my employees, I chose to give my product away for the benefits I could potentially reap from having it tested, and I accept the associated risks that go along with going out of house for the service I want. If I don't want my tests talked about honestly in public, I wouldn't give them to a member of the public to test honestly. Just my $0.02.