Yeah, whatever. I found a phone call useful, there are loads of other alternatives to getting roid of another PC - a grad student too kan old Pentium II off me for writing her thesis.
FWIW, I wasn't charged by Camara. Sorry, I have no connection to camara, but having visited Africa and being moved by the conditions children have to endure to try and get an education, I took the time to drop my PC to them. This was on a Saturday morning, with of volunteers breaking a gut to try and get anotehr shipment ready, so maybe they don't have the time to reply to emails...
I get about 10,000 spams a month. If a legitimate email gets incorrectly filtered, there is minimal (very close to zero) chance of me reading it.
Email is no longer a reliable means of communication, especially for first contact situations.
Er - they explicitly invite people to contact them by email with details of their spare hardware as part of their three step donation process! I contacted the address mentioned and copied a few others listed elsewhere on their site but got nothing back.