Some time back I volunteered to help out CS with the forum. A lot of spam. I catch quite a bit and get help from members who spot something like a link to a non-smoked product. Most are games, some private businesses, etc and nearly all are in 'red'. I reckon this was a simple error. There are some spammers who post a link that is lighter in color than the posted time of the last post. Very faint. Be careful with your cursor if there is an unusually large gap between the end of a post and the time above the red heart as this is where the nearly invisible spams hide.
Enjoy!