So far most advertisers have been helpful in explaining their products and so on. Some just advertise but not in them forum.
I think what kaylar mention are those that act as consumer and try selling his/her stuffs.
Other are those who will post with links, websites, contacts etc..... or spam.....

Some forumer are real users who like to share their true experience of the products they have been using, in this forum and other sites - like for myself. I am not a seller and I just like to share my personal experience with others here. I have installed and use it on own 5 rides and I am a registered with its respective clubs, fully equipped from day 1 as soon as I took my car!!! before even car was break-in with VECTOR tuning box, Ultra Racing Stabiliser bars, Toyo Proxies STII tyres, Bridgestone Potenza, Xado oil, and etc... but then maybe some will think I am a seller or a commission agent for the seller when I write these here? It hurts to be too good and being talked and think otherwise by other for my sharing!
I dont need these few hundred or thousand of cts or dollars for a living, just the passion and fun to share and play play to past times and not to make or save money - infact wasting times and money to run up and down for this play play fun- maybe I am too free and bore at my age now 53yrs, Tomorrow we are gathering to play play on our new toy Golf TSi to boost up to 200hp and 305nm as claim by seller, to let see if they are true? and we are real Golf car owners, so maybe other forumers may think otherwise? So plp will think we selling here again?
But the above said advertiser resellers (Vector & Ultra Racing), Xado recommended by authoriesd SC - Cergazam, is not myself or my company, as they are advertiser in Autoworld and are respected companies, except maybe Toyo and Xado who may not advertised here? I dont know? not my business to know.