The obscure American social network is not the interesting bit of information. It's that the infrastructure and delivery corporations decided overnight not to support a customer for not aligning with their values.

I don't think that the CCP had this sudden realization recently the same way many HN posters seem to have.

This is why China used the GFW to grow Alibaba Cloud, Tencent, WeChat and more that provide more than sufficient infrastructure and delivery, from servers to payment processors, and currently has almost-good-enough alternatives for the silicon down to the foundry level.

That's a good point. They probably want their own Github as much to control it but also so they won't suffer consequences from embargos like when Iran was blocked just recently