Now we support Grin. 
theymos:
Therefore, I'm happy to announce that the forum is now accepting grin payments automatically, probably the first site other than exchanges to do so. You'll find a link at the bottom of the evil-fee and copper-membership pages.
https://bitcointalk.org/index.php?topic=5098450.0
https://bitcointalk.org/index.php?action=credit;promote

theymos:
Therefore, I'm happy to announce that the forum is now accepting grin payments automatically, probably the first site other than exchanges to do so. You'll find a link at the bottom of the evil-fee and copper-membership pages.
https://bitcointalk.org/index.php?topic=5098450.0
https://bitcointalk.org/index.php?action=credit;promote
Well I never. It seems to have taken this world by storm. I'll wait 5 years before getting a chubby on.