The answer is to contact Forum Admin and find out costings and rules
If the Anthony bloke is promoting a product on his signature he probably should not be doing so but I have asked for clarification, as one member did claim to be paying for a promo link in his signature
Below is a a reply I received from Forum Admin when I questioned the rules a few months back.
Everything on the forum should carry on as normal, advertisers know that they are not allowed to post topics or posts advertising or pushing their products.
The sponsor a board section is purely just an advert link to the sponsors site and does not mean that they contribute or are allowed to push their products.
We have the specific avenues for this, so the rules still apply the same for topics and posts!
Thanks,
Mitch.