From the article: "On Tuesday, it was confirmed that approximately 20 percent of the applications in the BlackBerry 10 App world were in fact, re-packaged Android apps."

Why aren't 99% of BB apps Android apps? The key is "re-packaged." Blackberry is SO close. But you can't take an .apk file and install it on a Blackberry. That's putting a huge bottleneck around getting Android apps.