Andy Hackers used to sell ads on his podcast and newsletter. He says he found that selling to people who had no money sucked. The biggest companies, Sparkpost advertised and Andy Hackers back in the day, probably the ads are still in the podcast.
Indie Hackers is no longer a part of Stripe! Courtland (@csallen) and Channing (@ChanningAllen) talk about their history at Stripe, the process of spinning out the company, and future ideas for how to generate revenue now that they're indie hackers themselves starting at $0.