>>10158494First because it serves as a honeypot, and also so they know how much we know about them.
You must also understand that it wouldn't actually be THAT easy to get 4chan closed given that it belongs to Hiro, who's japanese. I am fairly certain this was the main reason why Moot sold it to him, he knew selling this to an american or a westerner was the worst thing that could possibly happen because they'd just censor the fuck out of us, so he chose Hiro. Hiro might be a little bit of a kike, but the censorship could be much worse, and unless you're autistic, you shouldn't care too much about the ads on red boards.
Look at what happened to 8-chan. Don't you think it's weird that the mainstream media regularly attack 8-chan almost as much as 4chan even though 8-chan never did anything relevant and it's basically a SJW version of 4chan with a fucking lefty/pol/ board and a muslim board? That's because 8-chan isn't really useful as a honeypot, and it's owned by an american.