Well, the wording we see -- and I've read it out once already -- is:
"Do you know of a story, a scandal ..."
I suppose a "scandal" could just about cover a public interest situation:
"... something that made you interested?"
That wouldn't necessarily:
"Chances are that a newspaper will pay. Do you know where a prominent person is living or what they get up to? Is a celebrity having an affair?"
So most of this is nothing to do with the public interest.