First I was confused? Do they give SSDs free of charge for every 10 hard disks they sell? Maybe. Then i read this:

"We shipped one million of non-HDD units, including solid state drives, media players and routers"

AHA!!! That's better. I bet media players and routers are more than SSDs. WD is selling good media players if I am not mistaken, so the numbers are logical. But close to 1 million SSDs? WD? No way. Close to 100 thousand maybe, 1 million? Only if they give them free with HDDs to big customers.