Who is horse_js?
In case you didn't notice, this is clever advertising for Microsoft Azure. Both authors work for Microsoft. I could count 3 mentions of Azure, two direct links to Azure products, 1 quote from a Microsoft researcher, 1 quote from a Microsoft dev advocate and 1 embedded Bing maps. You've just been played by Microsoft marketing. Also, Tom Dale works for Microsoft himself so it's just one big family story.