Anyone using put.io with an Apple TV?

yes- i do and it's phenomenal. There are a few apps on the appstore you can use, but the site through safari works plenty good as well. The video quality is amazing for me (where it can be iffy in my house) and it only takes a minute to download a torrent and be watching it on my tv through airplay. truly amazing.

I wonder who's owning/running that site and how do they use their collected knowledge of your torrenting habits & patterns?

From what I've read it's safe and anonymous. Can't be worse then downloading from my AT&T Internet at home. And I use it as a temporary placehold for media, that I then download and put in plex and delete from put.io which they say is gone from any account log or whatever. Who knows but it's out of country and is a seedbox of sorts that acts the same way.