[jameside]

> [Facebook] provides less donor data, so charities can't thank donors or reach out to them again in the future.

As a donor, I've found myself giving more often through Facebook to keep my contact information more private. I tend to unsubscribe from mailing lists and set up Gmail filters, so perhaps I'm more sensitive to unsolicited mail than average.

In my experience, most of the charities and institutions I've donated to directly (e.g. Red Cross, National Park Foundation, my university) send mail for years after a donation. Some of them like the National Park Foundation share your information with other charities so you get even more unsolicited mail.

In contrast, as far as I can tell, I haven't received any physical mail nor email after donating through Facebook. The privacy, for lack of a better word, is compelling enough I'd prefer to look up a charity on Facebook rather than going to their website directly.