A few years ago I purchase this app for $99.00. Great interface. Then I noticed my server would freeze. To find out later that the LiveAgent product would produce huge log files that you could not turn off from within the app. Tech support could not help me and they said they were not going to fix it and that I would have to wait until the team saw it necessary to work on it.
These companies are trying to acquire new markets and want the exposure of the WordPress community.