This is a tough one. When you have listened to a lot of gear and found components that outperform the competition, you naturally want to let others know so that they can experience the same satisfaction. This is especially true when the components are less expensive than the competition. We are always after the most performance for the least bucks and this is often a long search. Sometimes we only find these components because of enthusiastic comments/reviews by forum members. However, if we post too often about a particular brand/component, we start to look like a shill .... even though we may be stating the truth when we make comments like a particular component outperformed several others at four times its price etc.
And sometimes, through our auditioning and buying process we come to know and even like the manufacturer. I have found this with one manufacturer and now have coffee with him every few months. Yes, I would like to see him do well. But, I would not sing the praises of his gear unless I truly believed what I was saying (ie. I would not embellish just because I like the manufacturer). However, anyone that knows I have coffee with the manufacturer will probably regard me as a shill. It's a "lose lose lose" situation ...for the manufacturer (financially), for the reader (who may miss out on some great gear), and for the poster (who looks like a shill). For this reason, I often don't respond to posts outside of the manufacturer's circle. Personally, I don't post favourable comments in the attempt to get people to "buy" gear, but rather to add it to their audition list and make their own decisions.