Suggestion: Display some kind of “site supporter” symbol (a star? a trophy? a thumbs up?) everywhere the username of a site supporter appears. (i.e. not just on their profile page, but on the game page and game lists and chats, etc. everywhere you currently also display the user’s rank) The symbol should display rollover text (e.g. “site supporter”) and be clickable, leading to the “Support OGS” page.
Maybe something like this:
You should also make the “* Site Supporter *” labels on our profiles clickable. The idea is to make it easier for people to become aware that there’s a site support option and to get to the right page to contribute themselves, and also to increase the recognition of those who do support the site. (Thus making it even more attractive to become a supporter.)