I can help you increase your visit-to-signup conversion rate for free, if you're interested. Just soft launched my own service (www.leadnexus.co), where I will split test your signup forms to find more effective options. Your volume might make it a little tougher to optimize, but I bet I can improve on that ~0.3% conversion rate for you.

(That goes for anyone reading this -- happy to see if I can help, to test out my own idea. Not ready for a bigger announcement, but ping me via the site or travis@leadnexus.co if you want to give it a shot.)

Link - https://www.leadnexus.co