“Booters” are a cat and mouse game. They come and go fast, what’s on the first page of Google today will be removed tomorrow (metaphorically) and be replaced by another (random tech word).(newest TLD). It’s probably not worth CloudFlare’s time having a dedicated team addressing those, I assume they primarily handle them via reports from federal agencies or individuals. They more than likely aren’t hosting the “traffic” that gets sent in a DDoS (probably delegated to a botnet of IoT devices) so I can’t imagine much can be done from the detection front as the traffic to the site is generic user traffic.