Sometimes in the course of writing articles I create other things in the process from the research, such as a spreadsheet or something else that takes a fair amount of work.
For example, my upcoming article Inside the Mind of Bestselling Author Tim Ferriss: 268 Quotes He's Pondered Over The Last 5+ Years required that I build an Airtable sheet to tag and categorize the quotes.

I realized when I paid extra to get the spreadsheet along with Daniel Vassallo's Twitter course that there's clearly value in these kinds of things. I thought about maybe selling them as micro products but then I thought why not reward subscribers to my newsletter with free access to them instead.
These things will be shared with subscribers as the articles are published. I will notify subscribers how to access them, so be sure to sign up!