I work at a 501(c)(3), and direct mail is absolutely worthwhile. Maybe 1.5-3% of recipients of a prospecting piece actually respond, and they probably won't make up for the cost of the mailing. However, those respondents then get more mailings specifically for current donors and those mailings make money.
Out of that group, donors are checked against databases of known giving history and net worth. These databases aren't always accurate or comprehensive, but it helps fundraisers to ID people who might be able to give more--sometimes a lot more.
When high-value prospects are IDed, they usually get assigned to a major gift officer who starts building a personal relationship to solicit very large gifts. This is where the charity makes the majority of its revenue. I usually see 95% of revenue come from the top 5% of donors, largely individuals.
If you're uninterested in receiving lots of mail, most charities will try to accommodate that request. However, resources are limited and dealing with the problems of $XX level donors often takes second place to the problems of $XXX,XXX level donors. I've seen stacks of returned direct mail several feet high from people who moved, died, wanted no more mailings, you name it. It was always on the to-do list to remove those names, but never at the top of the to-do list.
As someone who would regularly give to the ACLU - IF THEY DIDN'T SPAM ME - I can guarantee they are loosing money (and supporters) because of their policy.
In particular, I contacted them asking if contributors were put on mailing lists. I was told that regular membership contributors were added to several mailing lists, but that one-off contributors were only sent a small amount of ACLU generated mail, and if I put a note on my donation to the effect of "do not send ACLU mail" then I wouldn't even get that much. I set up my bank's auto-bill system to send them a $100 monthly check (i.e. regular "one-off" contributions) and had "DO NOT SEND ACLU MAIL" in three different locations on the check and that phrase was the only thing in all caps on the check. Within two weeks of the check being sent I had started getting non-ACLU mail that had a typo from that check. I immediately cancelled my bank's auto-bill to them. That was more than 3 years ago. So their spam has cost them at least $3,600 from me alone.
This comment is an excellent illustration of why privacy is so important. Your goals are noble (I hope) but the methods employed are absolutely terrible.
"databases of known giving history", "databases of net worth"...
This is precisely why I only donate to charities and causes anonymously. It's sort of stunning that ACLU, the champion of privacy, does not offer this option.
Out of that group, donors are checked against databases of known giving history and net worth. These databases aren't always accurate or comprehensive, but it helps fundraisers to ID people who might be able to give more--sometimes a lot more.
When high-value prospects are IDed, they usually get assigned to a major gift officer who starts building a personal relationship to solicit very large gifts. This is where the charity makes the majority of its revenue. I usually see 95% of revenue come from the top 5% of donors, largely individuals.
If you're uninterested in receiving lots of mail, most charities will try to accommodate that request. However, resources are limited and dealing with the problems of $XX level donors often takes second place to the problems of $XXX,XXX level donors. I've seen stacks of returned direct mail several feet high from people who moved, died, wanted no more mailings, you name it. It was always on the to-do list to remove those names, but never at the top of the to-do list.