However, this is sometimes (often, actually) hard to explain to potential customers. It’s commercial…but it’s open-source…huh?
To try and solve this, we wrote a document to definitively explain how this works:
eZ publish: Support and Licensing Explained (90KB PDF)
Some of you out there in the content management world will find this interesting, as it provides a good example of the “supported open-source” model that some companies are operating under these days. This document is a little Blend-specific (we toss in consulting hours with an eZ support agreement purchase), but is otherwise generic to the eZ Publish Premium support plan sold by eZ Systems.