I am pretty sure that if they started arbitrarily banning customers/potential customers based on what some other people like or don't like, everyone would be up in arms yelling stuff about censorship or wokeness or whatever the word of the year is.

As an example, what if I'm not a DDoS-for-hire, but just a website that sells some software capable of launching DDoS attacks? Should I be able to buy Cloudfare protection? Should a site like Metasploit be allowed to purchase protection?