Actually, the WTS tells 2 stories
Russell
*** Proclaimers Book chap. 21 p. 340 How Is It All Financed? ***
As early as the second issue of the Watch Tower, in August 1879, Brother Russell stated: "‘Zion’s Watch Tower’ has, we believe, JEHOVAH for its backer, and while this is the case it will never beg nor petition men for support. When He who says: ‘All the gold and silver of the mountains are mine,’ fails to provide necessary funds, we will understand it to be time to suspend the publication."
http://www.agsconsulting.com/htdbnon/zwt0645.htm
*** Proclaimers book chap. 21 p. 350 How Is It All Financed? ***
In 1915, as president of the Society, Charles Taze Russell said: "Our Society has not sought to lay up earthly riches, but has been, rather, a spending institution. Whatever God’s providence sent in to us without solicitation we have sought to spend as wisely as possible in harmony with the Word and Spirit of the Lord. Long ago we announced that when the funds would cease, the activities of the Society would cease proportionately; and that as the funds increased, the Society’s activities would be enlarged."
Coal
***Proclaimers book chap. 26 pp. 577-578 Producing Bible Literature for Use in the Ministry ***
First of all, where should they locate the Society’s offices? Should they move the headquarters back to Brooklyn? The Society’s board of directors considered the matter, and a committee was appointed to check into the situation.
Brother Rutherford instructed C. A. Wise, the Society’s vice president, to go to Brooklyn to see about reopening Bethel and renting premises where the Society could begin printing operations. Desirous of knowing what course God would bless, Brother Rutherford said: "Go and see whether it is the Lord’s will for us to return back to Brooklyn."
"How will I determine as to whether it is the Lord’s will for us to go back or not?" asked Brother Wise.
"It was a failure to get coal supplies in 1918 that drove us from Brooklyn back to Pittsburgh," Brother Rutherford replied. "Let’s make coal the test. You go and order some coal."
"How many tons do you think I should order to make the test?"
"Well, make it a good test," Brother Rutherford recommended. "Order 500 tons."
That is exactly what Brother Wise did. And what was the outcome? When he applied to the authorities, he was granted a certificate to get 500 tons of coal—enough to care for their needs for a number of years! But where were they going to put it? Large sections of the basement of the Bethel Home were converted into coal storage.
The result of this test was taken as an unmistakable indication of God’s will. By the first of October 1919, they were once again beginning to carry on their activity from Brooklyn.