Welcome.
My own opinion is that it is fine to be a manufacturer or distributor. But to identify yourself as that (best done by adding a signature line at the bottom of your post). And never sell in posts. Great to help answer questions in general ways. Add knowledge and value.
By identifying yourself it allows folks to understand where you are coming from… good or bad. In many circumstances I think it can be good… as you probably have larger exposure than many forum members. But some folks may believe you will be bias towards what you sell. Through identifying yourself and the words you use in your posts you can earn credibility.
More than once I was puzzled by someone praising one brand and trashing others… and I found out they were manufactures of the brand they were talking up… that is not cool.
I don’t pay attention to the rules. I have been a high end enthusiast for 50 years. I try at all times to be helpful and courteous and to encourage the same in others. I would hope I never get near to violating any rules.
There is also a place to show your systems under your UserID. I show mine. This is a great way for everyone to see where you are coming from. I always try to show people where I am coming from, so they can decide if my advise is pertinent to them.