A late Hungarian rabbi wrote the following in his memoir about his stay in the United States of the 1950s (pp. 264–276):
As we entered the flat [...], a man of a small stature sat on a low chair, around the age of 35. [...] He spoke English with a very heavy accent, it was difficult to understand his words. [...] It turned out that he was collecting for a yeshivah in Israel. He passed my father-in-law an English language brochure about the institute, on which a multi-storey building was visible and next to it the name of the institute: Yeshivat Beit Yoseif. According to the brochure, in this yeshivah 100 bocher study the Talmud with its most important commentaries from dawn until late night. We were informed that the American agency of this institute is in this flat, and he, Mr. X. is its sole director. [...]
After the short "hearing" he handed over to my father-in-law about fifty addresses. On these slips of paper the amount was also indicated which the person contributed to the maintenance of the school. The addresses were from the state of Massachusetts. The terms of the employment were very severe. He began by saying that 100 dollars were to be deposited in exchange for the addresses! This would stay with him as long as my father-in-law gets addresses from him. He didn't cover travel costs! The collector had to cover them, as an investment in the business. However, only 30 percent of the collected amount were to be handed over to Mr. X. The rest is the collector's. [...]
My father-in-law came home for the Shabbat. He was full of experience and hope.
– Imagine, all my addresses came off! I hand over the receipt, these bring it to the inner room, I can't even look there, and they bring the money. [...] These get such a receipt which makes it possible to deduct the amount of the donation from their tax.
– How much expenditure did you have? [...]
– Very little. In most places there is an orech shtibl (guest room for poor travellers) in the temple. One may stay there for one or two nights. There are places where breakfast and dinner can be bought for cheap as well.
– How much did you collect? [...]
– Four hundred dollars. In contrast, I had 120 dollars expenditure. 280 dollars remained. Out of it I hand over 84 to the rabbi, thus net 196 dollars remain for me. [...]
As for me, I felt [...] [that it's better] than collecting for an Israeli yeshivah, out of which quite little could remain for the yeshivah, because out of the 30% that the mysterious person called "rabbi" collected, he had to spend a significant amount on his own and his family's sustenance. If so, what is to remain for the yeshivah? It seemed evident that this part of the thing didn't bother those who were collecting.
So in this example 30% covered the costs of the collector (travelling, lodging, food), 21% gross went to the rabbi and 49% was the collector's income.