alt Hacker News> which ironically is called "OpenPlatform" for some reason
This is pretty weird, the original text is 开放平台, but it basically is another name for "API" in China.
Not sure who started this, but it's really popular, for example, WeChat has an "Open Platform": https://open.weixin.qq.com/. AliPay too: https://open.alipay.com/. And peak strangeness, Alibaba Cloud (whose API is largely an AWS clone): https://open.aliyun.com/
Same thing in English, you have huge enterprises which basically operate on the complete opposite end of the spectrum, and end up calling themselves things like "OpenAI".
It even bleeds into marketing pages, go to the Llama website and you see "open source model" plastered all over the place, completely misusing both the "open" and "source" parts of it.