Matt johnson aka sturdymin took over sturdychan back in 2020 and immediately started grooming underage girls. He gave them backdoor access to sturdychan as a way to befriend them. Along the way, an anon by the name of kosaki came into the picture and started communicating with matt. Matt would groom the girls while kosaki would offer them money for their underage nude pictures. They would then blackmail the girls, to do what they say, through the pictures they naively sold. Rad was the only one trying to warn others that this was happening.