I think this is good!
I am an author, and I get comped a lot of books, and some software products. It just feels right to say something like, for example, "thanks to publisher Z for sending me a revue copy of book B" when talking about book B. If I get comped something that I don't like, then I won't talk about it.
Paid posters on Reddit, etc., are more insidious because you just have to guess if they might be paid by a company or government to push desired hype.