-> https://community.openai.com/t/please-automate-the-invoice-to-be-send-by-email-is-it-so-hard/1139369
If OpenAI, Cursor, Fyxer (and countless others) can't send invoices to their end users via email, it's because it's not that straightforward. And they all use Stripe Billing.
Genuinely asking: WHY?