Navigate to the signup form you use to collect new contacts, and sign up. People can only receive a welcome automation once, so you should use an email address that hasn't received the automation before. If you sign up with an address that’s already been through the automation, you won’t receive it. This is true even if you delete your address and try to sign up again.
I've been using Solo Ad Advertising for about half a year now... It was the most responsive advertising I EVER used in terms of RESULTS and, by this, I mean signups and SALES not just clicks on my solos... I used Solo Ad Advertising to promote other ad exchanges and, once, for example, I had a referral upgrade ratio of more than 12%, much better than the general upgrade ratio of that ad exchange... Using Solo Ad Advertising to promote other Ad Exchanges helped me A LOT to earn hundreds of dollars from my referral upgrades and purchases and also from scoring on the top 3 of some referral contests.
This A/B test indicates that engagement is one problem, but your subject lines are an even bigger problem—and one you can solve right away. CTR rates are understandably lower among the less-engaged group, but you saw engagement increase with a punchier subject line, so there is room to improve CTR among cold leads. CTR rates are higher in the more engaged group, but with a better subject line, this rate could go through the roof.
It’s true that your customers do want to hear from you. The fact you have a regular email marketing campaign is one of the magic elements boosting your ROI. But there’s such a thing as overkill. Once you come off a great campaign it’s tempting to run the same campaign again in an attempt to get the same results. The chances are you’re going to get diminishing returns.