Are you being sarcastic? If not, then it is not that shocking since it is not a common knowledge of how these things really work. I myself didn't know the overall story about it, but here's a little explanation:

1. Illegal streaming sites either:
   a. Steal from legal streaming sites like daisuki, crunchyroll, funimation and etc.
   b. Steal from 'fansub' groups like Commie.
2. Other 'sites' who offer re-encodes or downloads in smaller sizes:
   a. Steal someone's subtitle/translation and hardsub it together with their encodes.
3. Fansub groups:
   a. Have members who really works their ass off to offer their own translations/edits from legal streaming site's.
   b. Also offers the best video quality possible since they themselves find their own raws to encode in the best quality and compression.

So no doubt, there's nothing to argue about since Fansub groups offer the best of the best with their best work to offer quality anime for 'free'. Although they are somewhat still illegal, but the cause they only want to share to others is their favorites anime to gain some more audience for free. Unlike other people who steals other people's work just to paste it on their site to gain money from ads. Fucking stealers deserved to be wiped off from the internet an people should be more knowledge as to whom is really behind all of these animes they are enjoying to watch.