Apparently, lots of so-called journalists don’t.
What's not shown, are the details of the 1999 agreement. If one party wants the other party to look into a possible feared crime, the first party needs to withhold significant funds from the second party, then mention the "favor" eight times, the second party assured that the phone call will be held as top secret, never to be discovered by a third party. The second party, without fearing that either more money will be withheld, nor that the money already withheld by the first party will continue to be withheld, will look into the said possible crime, or else be breaking the agreement.
Perhaps someone should point out to the so-called journalist who wrote the DCWhispers piece that such requests proceed via investigator-to-investigator channels, not from a president who needs a favour.