Certificate manager is very expensive, nearly $150 in 2 days this month

Based on your description, it sounds like you may have created an exportable public wildcard certificate, which is causing the high charges you're seeing.

Here's what's likely happening:

AWS Certificate Manager (ACM) offers different types of certificates with different pricing structures:

• Standard public certificates for use with AWS services are free
• Exportable public certificates incur charges upon issuance
• Specifically, exportable public certificates for wildcard domains (like *.webhook...) cost $149 per wildcard name

The $150 charge you're seeing aligns with the cost of an exportable wildcard certificate. These charges apply immediately upon issuance of the certificate and cannot be reversed, even if you haven't actively used the certificate.

To address this issue:

1. Check your AWS Billing console to confirm exactly which certificate service incurred the charges
2. Delete any remaining certificate resources to prevent future charges
3. For future certificates, ensure you're using standard (non-exportable) certificates if you only need them for AWS services
4. Consider setting up billing alerts to notify you before unexpected charges accumulate

If you believe this was a mistake or you didn't intend to create an exportable certificate, you should contact AWS Support through the AWS Support Center under "Account and Billing Support" to explain your situation and request assistance.
Sources
Certificate Manager Payment Inquiries | AWS re:Post
AWS Certificate Manager Pricing | Certificate Management | Amazon Web Services