It depends. You get a hounder-hounder that does nothing for a while. Then, one day a new hounder-hounder shows up, and the whole roll of inactive witlesses is turned upside down. Or, the hounder-hounder-hounder will issue the order to the hounder-hounders to start calling on everyone that hasn't gone to a boasting session in a while, regardless of how long it has been. Or, the lead hounder will see fit to dredge up something and start harassing inactive witlesses (so they can't be left alone) after they had been let be for 10 years or more.
Or, some dingbat publisher--usually a pio-sneer or assistant hounder trying to be a hounder--will single out one publisher and start nagging the hounders to drag that publisher back into the cancer after several years. If that doesn't work, this idiot will "remind" the hounder-hounder, or take matters into his own hands and start hounding the inactive publisher himself.