How does it read like a success story? The bottom half of the article is all about how Shopify pulled the rug out from under them by giving them 3 days to tell their users about "breaking ToS", locking them out of their app, and ultimately seizing their account.
The 600k monthly recurrent revenue makes it look like a very successful story
Launching a product in a walled garden, getting around 10 million recurrent revenue with a small team and almost no other fees, then stopping after a few years looks to me like a dream come true. Almost better than not having the pull rugged. Once you have that much money it's time and a stress-free life that I would seek.
The article reads a bit weird to me because there's a lot of complaining about Shopify including in the title, yet they also mention that they knew this would be the outcome from the beginning.