How to understand "Commercial Open Source CRM"

[mario2027]

SugarCRM is a world-wide famous PHP CRM Project, Open Source CRM should be a totally free one, Commercial CRM should be a commercial one. Why SugarCRM expressed itself as a Commercial Open Source CRM???

[dtokeefe]

The idea of commercial open source is widely discussed on the Internet already. There are differences of opinion. One position is that there can and should be space for innovative business models in the open source world and that product developers and investors should be free to decide how to incorporate open source in their businesses.