When I was in Bethel in the mid sixties and serving in the Brooklyn Heights congregation where many if not most of the "heavies" were assigned, I assisted the Assistant Congregation Servant (as he was then called) in compiling and recording the monthly Publishers service slips,
Knorr, for one, never showed more than a few hours, usually in single digits. Most of it likely came from giving talks
Another of my duties was weekend receptionist at the 124 Columbia Heights building; first order of business on Sunday morning: go to the St. George Hotel lobby and pick up copies of the Sunday NY Times for Knorr, Suiter, George Couch, etc. It it was common to see many of them lounging around the home in sports clothes (we used to call them the "Ban-Lon Brigade")