Google Cloud Platform: resources used during free trial can exceed 300$?
I hope this question fits here, since this forum is indicated on GoogleCloud as a suggested source of information.
I just used all my 300$ in my free trial and, if I see the billing account of the expenses, they sum exactly to that amount.
Nevertheless, the last expense was an online usage of a service, which is paid "per request". It is quite strange that the cost of the last service summed up exactly to 300$. Also, if I see the reports, I should have spent much more according to the per-item pricing (according to my calculations, around 450$).
I imagine that the cost is evaluated periodically, the account terminated when the expenses exceed 300$, and the last services scaled so that the billing corresponds to 300$. Is this correct ? I could not find confirmation anywhere...
If this is correct, I would like also to understand if I decide to upgrade from my free trial, will I be all of a sudden billed the remaining 150$ ?
I apologize if this question does not fit this forum. In case please suggest in the comments a better place to ask and I can also consider cancelling my question, if it does not fit.
Exceeding Free Tier usage limits
Any usage above Free Tier usage limits is automatically billed at standard rates.
You can help monitor and control costs by setting up budgets and alerts through the Google Cloud Console.
update
The Free Trial ends when you use all of your credit, or after 90 days, whichever happens first. At that time, the following conditions apply:
To continue using Google Cloud, you must upgrade to a paid Cloud Billing account. All resources you created during the trial are stopped.
For more information check the information on Google Cloud Free Program
90-day, $300 Free Trial
The Free Trial provides you with free Cloud Billing credits to pay for resources used while you learn about Google Cloud.
During your Free Trial period, when you use resources covered by the Free Tier, the Free Tier usage is not charged against your Free Trial credits.
End of the Free Trial
The Free Trial ends when you use all of your credit, or after 90 days, whichever happens first. At that time, the following conditions apply:
To continue using Google Cloud, you must upgrade to a paid Cloud Billing account. All resources you created during the trial are stopped. Any data you stored in Compute Engine is marked for deletion and might be lost. Learn more about data deletion on Google Cloud. Your Cloud Billing account enters a 30-day grace period, during which you can recover resources and data you stored in any Google Cloud services during the trial period. You might receive a message stating that your Cloud Billing account has been canceled, which indicates that your account has been suspended to prevent charges.