Why is mcafee and vipre jerk's?

[TR098]

Hello,I just wanted to ask I found this article the other day and it says vipre and mcafee both unistall spy bot s&d why would they do this?

 

[tashi]

Spybot-S&D "Announcements". Warning! Vipre strongly recommends to uninstall Spybot-S&D!

2009
http://www.betanews.com/article/Spybot-Search-Destroy-competitors-are-trying-to-force-its-removal/1237840882