Sharing the metrics of your business and explaining exactly what you are doing at each stage and why can be a great way to promote your company.
Sharing your successes and struggles makes you more relatable. Also, people will be more willing to share your story if they have the details behind your success.
Some companies famous for sharing financials are:
ConvertKit
NomadList
eBizFacts
Entrepreneur on Fire
via IndieLetters.com