We sent out the latest batch of email thank-you letters this week. All finance that comes into SICM is acknowledged and receipted and for those who have agreed to it, we send acknowledgment by email.
It’s quick, but above all cheap and therefore cost-effective. The cost of one stamp may not be a lot on its own, but multiply it a few times and the amount builds up. A random look at one of the receipts shows that it was number 11377. That’s a lot of money when you add all those second-class stamps together.