I've been part of the Icinga team now since October 2009. The Icinga project is a fork from the well known network monitoring suite Nagios. Now I have to admit that I'm not up with all the politics of the reason for the fork and why there is so much dislike for the Icinga project (mainly by Nagios developers that are loyal to Ethan?) but the name Nagios & Nagios Enterprises are causing a divide within the Nagios community too.
So what's in a name?
Nagios Enterprises is a new "commercial" venture from the Nagios project. So for developers that had contributed many hours of time to assist with coding their work is now being sold without any renumeration. This has clearly got many off side within the Nagios community.
So regardless, the fork that has become Icinga, should be allowed to grow and develop further. This is what drives FOSS, the ability to adapt/alter code to suite. You only have to do a search and you will find many discussions around this (both positive and negative)
Where's the problem in that?
A commercial interest will never work within a FOSS community, it's a conflict that will only result in failure…