You got that wrong. No one was censored by CF, because you dont need CF to have an internet appearance. If anything, it's the DDoS attacks that are censoring KF. But in the end it just got more expensive for KF to speak.
and deliberately not protecting a paying customer as they are attacked by DDoSing criminals is just censorship by another name. it's a critical piece of infrastructure; large sites just can't survive on the modern internet without it. it's like if the police and fire services announced they wouldn't protect a specific house from roving packs of arsonists.
They might be referring to CF also being the domain registrar for KF.