In my case, it was BitMeTV. It is undeniably a great site - well-designed with great content and speed. I loved their selection - you could find old 80s stuff as easily as last season's Lost, but I found I didn't use it often. I live in the US and have Tivo, so I didn't need to download many current shows, and I knew I'd never have the time to watch all the old stuff I'd like to download (also running out of HD space). And I found it difficult to seed and keep my ratio up. Meanwhile, I found I could get all the TV content I needed from TVTorrents and a couple general/0-day sites. And so my BitMeTV account fell into disuse and I eventually let it go. Um, the end.