Dunno where you heard that from, Spud, but like everyone else has said, that's total bunk. For every person that downloads a manga, someone buys one. (And half the time it's the same person that DLed it because it's nice having it in dead tree format.)
As for One Manga... Surprise! They're still up! From what I can tell, they're still distributing manga, but I don't know how yet as you have to register on their site now.
As for One Manga... Surprise! They're still up! From what I can tell, they're still distributing manga, but I don't know how yet as you have to register on their site now.