Earlier quoted context omitted.
Even if you take out the competitor factor the article was really about their opinion on Twilio's status as a company. I expected an article talking about supposedly bad cancelation or privacy policies, something like that. Pretty bad headline.
I see he changed the headline. Pretty funny. Not sure how this person has any insight on Twilio financials. It'd be interesting to get this person's own background posted on this space. I think it would pull back the veil of ignorance displayed in his blog post.
The author makes several valid points but undermines the overall critical nature with what appear to be non-sequiturs. If this article was a frank accounting of Twilio's position with some postulative math about their sustainability, I don't think anyone would've objected. The issue was the accusations, most of the content is factually correct (Twilio did raise a lot of money and continues to spend a lot of money).
What we have are two different world views, and it's not clear yet who is correct.