Writing to staff, Miller said that the results "underlines the need for GNM [Guardian News & Media, the immediate parent of the Guardian and Observer] to transform itself into a financially sustainable, digital-first organisation," a need that he went on to to describe was "pressing".

http://www.guardian.co.uk/media/2011/aug/01/pay-top-guardian-media-group-executives

The word "sustainable" is widely used but I am still not sure what it means. Here is an example from the Guardian. what to think?

Perhaps there is an implication of stability. as if a sustainable organisation stays much the same.

But "digital first" at the same time? Could be rapid change as well.