I think the OP is thinking of the way WT pushed radium as a beneficial health product, back in JFR's days. One quote I found:-
As we know Radium is an extremely harmful radioactive substance. The “Radio-Solar Pad” was basically a pad containing radioactive radium which you simply strapped to your back. Its makers claimed
"radio-activity is further increased by exposing the pad to sunlight" and "when applied to the body, the pad immediately begins to discharge this energy into the system, sending the life giving current through the blood and nervous system."
As this was endorsed by the President of the Watchtower, Judge Rutherford, it can only be assumed that he would have received some kind of personal payment.
How many Jehovah Witnesses got cancer after wearing this device? Please see Blood Guilt
JFR was prone to jump on all manner of quack science and write about it. The "Water Canopy" is another example, from Isaac Newton Vale, another quack.
George