I made my first sale! The rush when I saw the Stripe email notification yesterday was something else.
I'm an SEO professional and Hugo developer, and my product is an SEO theme for Hugo.
I also rolled my own lightweight ecommerce implementation using Stripe Checkout to sell it. Aside: if you use Hugo and want to replicate this, I wrote a tutorial on the subject: https://moonbooth.com/hugo/stripe/
So it was a double rush when I made that first sale: my ecommerce build worked too! I did of course test it using Stripe's test mode, but you're not allowed to test live Stripe implementations, probably as a safeguard against money laundering. Anyway, now I know it works for sure!
From an SEO--and code simplicity--standpoint, I do love my ecommerce implementation. All SEO backlinks point to my site, and not to Gumroad or any other third-party marketplace.
Additionally, my sales page is just a blog post with a buy button (I did remove the email subscribe box on that page to avoid distracting customers from their purchase). I love simplicity, and I love building in a way that helps SEO.
Hope others find this useful, and if you're yet to make your first sale, perhaps inspiring too!