Once in a few days, I erase unsubscribed users from email list. Every time, I have noticed majority of the unsubscribed leads have signed up for mailing list through Pop-Over form.
I don’t have the exact percentage or other numbers, but right before writing this post, I erased 367 unsubscribed leads. Over 340 leads have signed-up through Pop-Over form.
It will be interesting to track the exact numbers and if there is high unsubscribe rate, I may decide to remove the pop-over option and use inline sign-up form to collect email leads.

This is very interesting actually. I was thinking about using a popover to collect user info and build my list. It may not be worth it, if 1. I’m annoying people & 2. The don’t stick around over the long term, so that I can continue to market to them. If you ever get those number you should write a follow up post and let us know the results.
Very high Unsubscribe rate is true, but it comes with high number of subscriptions too.