Can we rely on Referrer URL on Global form submissions to filter the unique origins?
Hi all,
This may be a topic discussed in length and I'm only here for a final validation if anything has changed from Marketo end in the recent months.
We would like to use Global gated content forms and in my smart campaigns I would like to use referrer url as the filter to only take the submissions coming from a particular page. Can I trust the referrer URL to always be the correct place the submission come from?

If that's reliable, then why do I see various scripted methods using the Forms 2.0 API to inject hidden fields that act as identifiers to decide where did the submission came from? (https://nation.marketo.com/t5/marketo-whisperer-blogs/embedding-global-forms-without-losing-tracking-part-iii/ba-p/245549)