A characteristic and great feature of the world of free and open source software (FOSS) is that many of its participants love debating business models. Do closed source software vendors do that? I doubt.
Simon has some great points in his posting yesterday, reminding us all that the non-open features or services a company provides to its customers may lead to lock-in and reduction of freedoms for the customer. He also comments that open core businesses "stand to benefit massively" from this. It seems that he is arguing that this is a bad thing. My main point is the opposite: by having vendors in the open source space that benefit massively, we will have a stronger world of free and open source software (FOSS).