For the last few weeks, you may have noticed a 'Group Pay' module on every. Single. Page.
This is not something we've added. This is not something we want you to do. Unless you're interested in paying for the website to be 'premium,' for the rest of the server's existence, please do not waste your money on the group pay. :P
On the topic of donations; we will be opening up server donations, again, with the next version (1.8) update.