FYI: Google will start billing for all Cloud Monitoring alert policies on Jan 7, 2025

I just received an email from Google Cloud about this that's probably going out to everyone who owns affected projects, but I wanted to share it here so anyone who doesn't happen to have a project active currently won't be caught by surprise. The costs (in US dollars) are $1.50 per month per alert condition + $0.35 per million time series returned by alert queries. Full details about these costs are listed on the Google Cloud site.