GCP to introduce an additional charge for publicly addressed VM instances | Hacker News
Looks like the Always Free page was updated to include a free IP too, so you'll still be able to use it for free cloud hosting of small loads. "Each month, eligible use of all of your f1-micro instances and associated external IP addresses are free until you have used a number of hours equal to the total hours in the current month" - https://cloud.google.com/free/docs/gcp-free-tier
Wasn't there last time archive.org crawled the page, so it is a new addition.
真面目に読んでなかった・・・。無料で使えるインスタンスについては外部 IP の無料も維持されることになっていたのか・・・。