I agree with this, but even within the RuneScape community it is poorely advertised, I would suggest buying a few banners on other sites more frequently visited, such as Tip.it / Rsbuddy.com / Runehq.com
If you see, Gold4rs.com advertises on all of these sites, which makes gold selling that much easier for them, even though they have a bad customer service rep.
But if you think about it if there was adverting for jagex, they would have pple from jagex come to the site, theyde have the money to donate like 1k bucks to become trusted and slowly ban the highly trusted members of sythe. Would bring attention to sythe, but maybe too much attention