I'm trying to increase my opt-in rate on my lightbox to my list.
I can't seem to get above 2%. I've tried about 50 different versions which I run for about 300-500 displays each before trying something else. Changing images, headings, testimonial vs no testimonial, hype vs soft sell, etc.
I'm not a copywriter, so perhaps it's not surprising.
My current one (optin45), which I just put up this morning is currently converting at 1.4% (although there's only been 367 views).
I've used plainer ones (like optin17) which have gotten around 1.9%.