Is there a guide thing out there for donating? I was considering it, but I don't know what perks there are with being a donator. Thanks!
Basically, you get a gold coin and yellow font name on the forum and exclusive RP only equips and cosmetic changes.
Everyone has access to it, meaning that everyone can see the items. The prices you see for items, i.e. 5 NX, are prices that you pay for in RP (Royal Points). RP is a currency that is obtained by donating. If you run out, you need to buy more if you want more donor items. It is not that you unlock the tab and can buy everything with normal NX once you have donated once.