Tracking referrer via hidden field and trigger campaign not working?
I've attempted to setup a campaign that tracks the referring URL to a Marketo landing page using a UTM to track the original source. So the path would be:
Clicks Twitter Advertisement that has UTM:
godigitalmarketing.com/learn/blog/brand-building-how-to-turn-a-negative-review-into-a-positive-branding-strat?utm_source=twitter&utm_medium=social%20&utm_campaign=BB16Q2
They land on our blog page, if they click the C2A at the bottom of the page they are redirected to a marketo landing page that has a hidden referrer field in the form:

Then I have a campaign set to trigger off of the UTM source in the URL (If referrer contains "twitter" then lead enters campaign flow)

This is not working currently and I feel like I am missing something big, or don't understand something important about UTMs... HELP!