I have never heard of people being paid to give out scoops or sports journalists paying to get the scoop.
The closest thing I can think of is the LA Times scandal with the Staple Center magazine issue.
I have heard journalists doing coverage like giving a team a profile or something like that to build a relasionship with a team. But nothing like giving them cash for a scoop like i.e. LA Sparks being sold or something of that nature.
But maybe it happens I don't know.