About a decade ago, I gave a nice chunk (for me) to a group that said they fix up laptop computers for injured Vets returning from Iraq/Afghanistan.
That put me on their list.
Twice a week I was getting their mailings, wanting more. Those contents of those mailings got more professional and more costly. Even the returns went from a postage stamp to prepaid FEDEX. FEDEX is not inexpensive.
I returned some of their mailing and asked them to remove my name. It took 3 months and 2 more requests before they finally quit sending stuff.
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Back in the early 1970s I got an economic publication. One issue had a list of many of the ‘well known’ major donor organizations and the amounts that actually went to help those in need. For most, the number was pathetically small, but the administrative fees were upwards of 70% or more of the received donations.
I got interested in this sort of stuff when I read about the big offices, executive salaries, limos and corporate jets in the Sierra Club and Green Peace.