Yes, you could call it an ad, but it reads as much more down-to-earth and straightforward than what most people think of when they think of advertising. They're

Yes, you could call it an ad, but it reads as much more down-to-earth and straightforward than what most people think of when they think of advertising. They're simply describing what they built, why it was difficult, and why they think it's important, with a minimum of marketing fluff.