Despite the defense of InstallMonetizer, their payment model and practices do not appear to be what you would find with a legitimate software business.

InstallMonetizer has been used by malware as a method to make money as early as April 2011. It was being silently installed by a large botnet, and I assume that the botnet affiliate was making money off the installs.

Their installers are also labeled as a malware by AV vendors, and treated as such by network monitoring infrastructure.