No stuffing envelopes. Just write your message, press the send key and multitudes receive it. In many ways this is more effective than paid advertising. Because a newsletter can be written in a non-commercial way. It is a letter from a friend.
People read it with interest.
They study it and share it with their friends. It contains helpful information. It can be trusted. By contrast, paid advertising doesn t enjoy anywhere near this level of acceptance. Because the advertiser has paid to sell you something.