So, I'm well-aware of what's on this particular Marketo Developers blog entry, but I'm a little stumped on something I'm trying to achieve.
Right now, I have several different domains tied to one Marketo instance. Now, I know when a visitor goes to each website that Marketo is going to write domain-specific cookies for each site—but I'm attempting to route around this by having the server write _mkto_trk values for every website in its own domain-specific cookie once a first visit has been logged on any of those domains. I'd like the session to carry between each domain, so would writing values like
Alternately, would using a "group" domain (e.g., populating fruitsalad.com across all domains rather than change things) consistently across all domain cookies solve the issue?