Lead source parameter question
When using the A/B landing page test, I noticed there was an option to build a URL with the parameter "<baseURL>?Lead_Source=Plant" where "Plant" was a self-defined value. I tested it and it seemed to work, so i bounced it to some other co-workers and they tried testing it, but instead of the value coming back as "Plant" it came back as "Marketo Form."
Any ideas why that would be?