I just stumbled upon
Mage_Adminhtml_Block_Newsletter_Subscriber_Grid_Renderer_Checkbox and am not able to tell where exactly this renderer is actually used.
Can anybody tell me? Or is it some relict that is still there but not used anymore (I am using 18.104.22.168)? Just curious.
In my opinion it would make sense to use it as a renderer in
Mage_Adminhtml_Block_Newsletter_Subscriber_Grid::_prepareColumns but there is no reference. Am I missing something?