It's odd ‐ I'd definitely donate to a local neighbor in need, but would want to at least know who and/or why. What's the point of the signs otherwise?

I've always assumed it was to build support for someone who needed help, but it was unclear to me who it was for, and for what reason.

It's still not real clear to me, but I can send prayers even if I never know.

Yes, that's where I've seen it. Thank you.