[impappl]

The link you yourself share features many comments, including by GitHub themselves, that this wasn't a new limit. They publicised the change earlier in the year.

As the product manager pointed out https://news.ycombinator.com/item?id=13229461 and as a Quora answer from June also reveals https://www.quora.com/What-are-bandwidth-and-traffic-limits-... the GitHub pages limits were public since at least June.

[sytse]

Yep, but we only noticed it on Dec 21.

[impappl]

Great, but that's very different to your original statement of "GitHub Pages was limited about 3 days go".

[sytse]

True, that was wrong, it should have said we learned of it 3 days ago.