Alright, no need to cover off who is or is not a trader on the forums. The mod/admin team closely monitor for potential traders and we have regular discussions about actions in cases that are clear, and those that are not so clear. At any given time there are a heap of potential traders being actively monitored.
As a user/member of this community (not my role as an admin) though, I personally feel that Martin spends a lot of time talking about his business and not much adding useful, actionable information....plenty of other regular posters on here own businesses and are very helpful with free information and advice to members on their specific issues, and URAS mentioned above is one of those (I can also think of Dan from Elite, John from UAS and a whole host of others). Yes they do run businesses but the difference to me is that they are not always posting about themselves, the products they sell and their own acheivements....they let their happy customers do that for them.
The business owners and people who actively work in the industry every day are a huge asset to this community in terms of accurate, up to date information based on direct experience (not "my cousin's boyfriend's mate once did xyz"), and that is why there is some leeway allowed in defining who is "trading" and who is not.