I don’t have first hand experience with this, but my client is maintaining a list of users in Sendgrid, I update the list via API and do so based on different actions and there are multiple lists of users email addresses, some are for abandoned carts, others are for new signups. I believe the client has automations in place inside of sendgrid that then send emails to the entire list of emails. I have not looked into it specifically, but I believe I can trigger via API the send email to the list function, meaning Bubble doesn’t send the emails looped over each user, and instead Bubble just triggers the API call to notify Sendgrid to send the email to the list of emails specified.

I’d think Postmark would have similar functionality and that this would reduce the costs of sending out the 500 emails weekly.

It doesn’t solve the problem of event notifications.

What is the source of the WU consumption, is it the email send, or the deletion of old notifications?