IMO, the aggregator seems like the wrong end to apply AI to. I would think the companies issuing press releases would use AI to write the releases and publish to all the platforms they want to reach.
I would rather my aggregator simply deliver what is served, and for any summarizing to be conducted and vetted by the source.
That is literally the job of the Associated Press. They republish press-releases across publications. At this point, most press releases are written by AI at least in part, so I'm not sure a further summary would be helpful.