I think most all of us here on Lemmy are people with technical background. Most of my professional contacts remained using Reddit, Twitter and even excited when Threads launched.
If you are non-tech background, please comment and share what you do for life.
If you have tech background, upvote this to help promote this post so that we can find more non-tech users on Lemmy.
Probably literally mails them with postage, spending money on stamps and such.
Nowadays you can be like “oh shit my bill is due, gotta open up my finance app to pay the bill.” Before it was the same but you had to remember 3 business days in advance for the postage delivery times.