Email is expensive, require extensive monitoring, bounce checking, extra storage, opt-in verification.
Webhooks are cheap and quick.
1 email is $0.0001 on AWS SES 1 webhook is ~$0.00000083 assuming 512mb for 100ms.
1 email is $0.0001 on AWS SES 1 webhook is ~$0.00000083 assuming 512mb for 100ms.
Webhooks are... easier to consume.