SpeedyCuber was Always a good guy. He was banned cause people tought he had a red sand duplicator/switcher. He worked so hard for all his money and all his stuff and now he is banned. He was so nice for everyone and then this happend, Some people were shocked people like me...
Well, he had one, butfa basically created a warp on speedycuber's place, advertised it in chat and half the server rushed there, including me, to see cuberto (speedy's alt) afking under a sand to red sand converter. Some people even got to grab some red sand before cuberto switch the converter off. Normal sand costs like 10-15 skybucks and red sand was sold from 125-2000 skybucks, so you cant really claim that selling overpriced normal sand that was converted is hard work. Butfa is probably mad cause he bought 16 stacks or red sand for 500 each block.
Do ask your friend to create a ban appeal on the forums and try to refrain from explaining your friend's character too much, because it does not matter. All that matters is what happened exactly that resulted in the particular Moderator deciding to /ban your friend.