Chaku-Uta full breaks over 50 million downloads

The service started on November 19, 2004, and on May 17, 2006, it seems to be pretty good because the dedicated PC distribution site "LISMO Music Store" opens.

It is about 210 yen to 420 yen per song. For PC users, from 1 song 315 yen. However, since the sound quality is 48 kbps at the maximum, it does not become a story.
KDDI Company Info: News Release> EZ "Chaku-Uta Full (R)" Over 50 Million Download

Background to the 50 million download breakdown is as follows.

November 19, 2004: EZ "Chaku-uta Full" service started
January 5, 2005: Over 1 million downloads
February 5, 2005: Over 2 million downloads
March 1, 2005: Over 3 million downloads
March 17, 2005: Over 4 million downloads
April 3, 2005: Over 5 million downloads
15th June 2005: Over 10 million downloads
September 28, 2005: Over 20 million downloads
December 28, 2005: Over 30 million downloads
May 20, 2006: Over 50 million downloads

Considering 210 yen per song, is it about 10.5 billion yen, sales? How much is net profit ....