So DNC is paying someone else, who is paying him.
If you start with the assumption that a democrat is lying, you will very rarely be wrong.
The DNC may not be paying him, but you can be sure _someone_ outside the Rich family is paying him to keep them “in the tent pissing out” (as LBJ used to say).
It’s like employees of investment banks donating to the Clintons and then receiving an employer bonus commensurate with the “donation”.