Absolutely! It isn't the only decision, not by any means. But it definitely has an impact at some point. Interacting with the author and publisher gives me insight into which people have thought processes that complement mine. This makes things easier to integrate into my games. It is kind of like reading reviews and assessing which reviewer has tastes that match mine. As well, knowing that I can easily ask an author to clarify how something works is a nice benefit.
If I might use Adamant Entertainment's
Hot Pursuit as an example, this is a product that at it's face value might appear to be of dubious value to me. Chase scenes are something that I once tried, didn't do well, and decided wouldn't work in gaming like it does in the movies. But Barsoomcore is the author! I like his storyhours. I like most of his posts. It would be a privelige to play in a game he was running. So maybe I ought to take a look at this Hot Pursuit product and see if he can show me how to improve things? Besides he was enthusiastic about promoting it and I know I can ask him questions.
A nice guy whom I respect, trying to sell a product on a topic that is exciting and I have implemented poorly in the past, who I can ask questions of if I have trouble. Where is the downside? But if I didn't know Barsoomcore from his posts, and if he wasn't promoting the product, I probably wouldn't have bought it.
Interaction with an author or publisher can be good.