There are rumblings on Reddit that the free tier has been and is being limited to less than half the allowance.

Also that it's a soft limit so AWS in crack style you start getting billed for overages.

https://docs.oracle.com/en-us/iaas/Content/FreeTier/freetier_topic-Always_Free_Resources.htm

Documentation has been updated and a few chat screen it's on Reddit show that the terms and calculator will follow.

So just a heads up, oracle are not known for playing nice, this could be nothing but just in case, manage your usage or you could end up with a nasty bill.

Thought I would post this so it can be updated as we go.

Could still be nothing.

Edit: now confirmed

You will start being billed from the 15th if you are over the NEW free tier ... enjoy your 4 days notice.