Two arguments that I think could be strongly made against this discussion are:
1. A gambling subsection brings the possibility of online gambling to the light, even more so than already has been. If the average Sythe user has happened to not stumble across the online gambling community, thus far, and they should see this subsection, they will have a wealth of information regarding where to and how to gamble online.
This is productive to the gambling sites, but not to Sythe's marketplace. The reason being why, losing the gamble is the history of the trade. Immense studies have been shown confirming that gambling is compulsive and will in turn compel you to take actions you would normally not in order to fulfill that compulsion. For example, SCAMMING.
Now I know Sythe's users have a long history with dabbling in the various forms of Runescape and other related gambling, but to promote it on your homepage is a different story, which leads me to my next point.
2. If you visit any of these current poker sites being promoted for RuneScape poker, you'll see one of their primary rules are not to discuss RWT. This should be more strictly enforced than it is. All capitol and current investments in such a project could be lost in an instant if the government were to investigate such a site and find that it was associated with say, a gold site, along with almost surely legal action. Especially when the rake they take off of pots is the product they sell.
The association and promotion of such endeavors on Sythe could possibly leave them as affiliates, and possibly have similar outcomes. Yes, I say possibility, but is the income from this site and all future income worth that possibility?
With that being said and with further thought on the subject I do not support and even go so far as to suggest the removal of certain advertisements.