Career Advancement

Nothing specific and I haven't seen data. BUT I see tons of marketing roles that now require MCE at min. I'd say you can get a raise or get a higher offer at a new firm, esp if you have 1-2 years of real exp.

Agreed, I went from getting 1-2/week requests to interview to 3-5/week. My salary jumped the moment I had marketing automation management experience but I can't speak to the certification from a salary perspective. 

That's a good point from Jeff - have those keywords in your profile:

Marketo, marketing automation, Marketo Certified Expert, demand generation.

Recruiters are happy to take just about anyone with a few months of exp.

Lately, I'm seeing the same thing that Jeff is experiencing and the job title and description is preferable compared to what I was getting contacted for in the beginning after I got certified.  But the only thing is that I'd have to commute much farther and I hate traffic. I'm spoiled at my work right now.