I did directly compare it to another closed plattform store, which is Xbox Live Arcade. When a very successfull game sold 77 copies in a year when the same game sold 1 million copies (on xbox alone) in a timeframe of similar length (0.0077%) that still says something. I am very certain that SMB still sells alot more than 77 copies on XBLA per day!

Of course you cant compare the Ubuntu Store with something like XBLA but still, its helps bringing stuff into perspective.

Anyone who got it in the Humble Bundle got a copy in the Ubuntu Software Center too.