Not terribly surprising, it was understood that at a minimum 4chan was working with the FBI a decade ago. It's also entirely likely they weren't hacked and the leak is fake as well.
Wouldnt be surprised either. I watched the documentary deep web and the feds admit publicly they were running half of the dark web business to make their way to the top. Like there isnt anything better to do than subscribe and wait (there isnt corrupt officials who sold their souls to aipac, congress doing inside trading, billionaires screwing working class and buying governments, healthcare causing ten of thousands of deaths, ...)