The addition would allow Shopify + Sender integrations to tie their lead generating marketing campaigns to new subscribers with UTM codes in the URL.

Currently, it looks like the URL is included in the Visited event only. Ideally, it would be included in all events but just including it in the Subscribed event would already add value to external campaign tracking via Sender form submissions.

If this is already possible, please link me to the documentation. I looked through the API docs and couldn't find the list of all included fields for each event.