@dickraney For now, my workaround is to put a dark box around it, by switching to the Text editor (HTML) for the emails, and using this code:
<div style="background: #555; padding: 1em;">{{cart.unsubscribe}}</div>
It’s not looking great in the email, so I’m hoping there’ll be a real fix for this issue soon, but at least the link is more visible this way.
This still was not fixed in the latest version of the plugin (1.21). I’m running WordPress 4.4 with jQuery 1.11.3.
I fix it myself each time the plugin updates, but it’s a bit annoying to have to do each time if it’s such a small fix.