I did something similar, and for me also was definitely worth it. I collected data over a full year of applications, and in addition to the updated cv (from f

I did something similar, and for me also was definitely worth it. I collected data over a full year of applications, and in addition to the updated cv (from fecak here's on HN), I also started to contact recruiter directly on Linkedin. For the same number of applications (before and after the new cv) I had 11 times more interviews than before