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I need to be precising something that is a common misunderstanding: By subscribing to the documentation, you are not *buying* CB 1.2 RC 3 !
You are simply supporting the project by subscribing to the documentation.
As a thank you we give access to RC releases to our doc subscribers and other thank you bonuses.
You are then free to install CB 1.2 RC 3 on all your sites. So you are not buying licenses.
CB stable releases are free, and so will CB 1.2 Stable be, when released.
So, thanks for your support to the project.