RIM removing sideloading of Android apps

Saunders said the reason was to prevent piracy, citing figures from an unknown source saying that over a quarter of Android apps are downloaded illegally, and calling Google Play a "chaotic cesspool."
Did the number of legit Android apps just drop by 25%?
Saunders claims that there are developers who refuse to work with RIM until sideloading support is removed.
It's not like RIM has enough devices in use for this to make any impact at all on Google Play or Android, but it's still interesting to see one handset maker citing Google App Policy as a reason for excluding it, rather than just a mere profit move.