How captive.apple.com is used by non-Apple devices?

Every time, I try to use my hotel's WiFi network, at some point of loging-in to it, I see that my browser (or WiFi connection pop-up) is redirecting through serie of websites, among which I can clearly see http://captive.apple.com/ . The thing is that I have absolutely nothing in common with any Apple-like device, because: - I'm using either PC and Windows 7 (with Chrome) or Android device (with WiFi pop-up), - I'm pretty sure that neither my hotel network's router nor any of its components isn't build up based on Apple device, simply due to costs (non-Apple-based solutions are cheaper, I think). [This answer](https://apple.stackexchange.com/a/290467/46952) and [this question](https://apple.stackexchange.com/q/211593/46952) roughly explains (to a non-Apple user, like me), what this site or service is used for. But, the question remains: What it has to do with non-Apple devices or how such devices can be using it (how or why non-Apple device can be using Apple-like service)?