I wouldn't actually refer to most of the 3rd party plugs as LE, because they are full featured and functional. They are only limited in that they are locked to Sonar. Most of them were also sold by the original vendor in unlocked bundles that we could upgrade to, if we desired to use them elsewhere.
Not a bad deal overall because we essentially got them included for free when we bought Sonar. It probably saved us hundreds, which is important if you are just starting out and need some plugins. The vendor also got a deal because they got product distributed to more users to expand their customer base. Win/win deal if you ask me.