1. Can someone pay ach by logging in to their bank like Plaid does. Or the customer needs to verify 2 tiny transactions to confirm it's their account?
2. Are there any transaction fees (other than Stripe's fees)?
3. Can I create a recurring payment via ACH?
4. Is it possible to create a product/buy button that different customers can visit to place an order or do I need to create a unique invoice for each customer?