I would say that the main focus is on editorial content.
If you can quickly deliver images on current media topics (especially business, politics), you will certainly be in demand by many local online newspapers and magazines (Focus, Handelsblatt, FAZ, Sddeutsche, Spiegel, Wirtschaftswoche, etc.).
I remember for example that a lot of pictures about the insolvency of Signa Holding came from Imago Images.
The sale provisions seems to be quite fair with 50%. However, I have no experience with the agency myself.