Openlag software: A model for close and open software

Openlag software is a model in which a company accept to release a product with a new open sotfware license (for example bsd) in x years time, x is the lag.

For example, imagine that Wolfram decides to use this kind of model for Mathematica with a lag of three years, that is in three years you have the three years old version in the open software. This kind of model would promote the adoption of this product from universities and other big corporations that don't want to use a black box, and at the same time the company has to innovate new features since the old version will be in the open and for free.

What do you think about this model?

The first axiom of any new model of sofware is that it should help create new jobs and profits for companies and innovate, do you think this model would allow this?