You really think people advertising adaware 'Improve PC performance now' and 'watch XXX live with donkeys' are idealistic individuals fighting draconian copyright laws?

Also I don't know about kickass - but for example the /scrape endpoint is blocked on the piratebay tracker (and most other 'commercial' trackers) -- meaning that you can't get basic statistics (like leechers/seeders) about a torrent which is tracked by them without going through their advertisements.