Ask HN: What are some hacks of real founders who did things that don't scale?

Ask HN: What are some hacks of real founders who did things that don't scale?
236 comments on Hacker News.
Inspired by Paul Graham's phrase, I’m curating an open list of hacks/stories of real founders who did “things that don’t scale” to power through their initial startup days. What are some of the hacks you have heard or have personally experimented? Thank you in advance!