Hehe, well, because she's on the edge of breaking the 1 million mark! Haha, which definitely she can looking at the sales. But overall, definitely she has sold more than 1 million internationally, through her CD sales in Hong Kong, Singapore etc.
Well, they count via the Japanese Versions so if you get it via Yesasia or so on, I suppose it is also part of the album sales as well. The overseas versions are always not included in the sales.
Anyway, yup, all those dreaded P2P! Distributing Ayu's effort all around! Piracy! So haha, so here's appealing to all initiates, please buy the originals to support Ayu! Haha, of course that's unless there is no possible way whatsoever to get anything Ayu, then maybe you're allowed to download.