To get the visitor’s attention without irritating them.
Have a small sprite animate across the screen, lodge itself to one end of the screen and follow the visitor when they scroll up and down. This can be triggered by time or exit intent just like a normal pop-up. It doesn’t have to be big, a small one might be better, and it should have an interesting image or symbol on it to make the visitor want to click it. Only when the visitor clicks it the opt-in pop-up appears.
In each situation, there is a different optimal time for an opt in pop up to be displayed. These are influenced by many parameters like who is the audience seeing this, how long is the content, what time of day, etc.
Have an option in your pop up management software to request a test where the pop-up will be displayed at random intervals. The more conversions you have for some of the times and the less for other the system will start showing the better ones more and drop the worst performing ones.
If it’s easy, doesn’t cost more and results in higher conversion rate, wouldn’t you like it?
Use the principle that a small previous act of (public) commitment will lead to a higher action rate when you ask for it later.
When a visitor lands on your page, show him a pop-up window and ask him to click on one of two buttons. Something with a text like: “Do You think that the right information is critical to your success?”, and two buttons “Yes,” and “No” to click. The majority of people would click on the yes button (especially if they are the right audience). The window disappears – it took about five seconds – and they go on consuming the page.
They now acted by clicking and committing to a particular point of view. It’s their “truth” now. The fact that it’s on a public web page (even though nobody else sees it) makes it a kind of public commitment (and they can also assume you know what they “said.”)
At some point (timed, exit intent, etc.) they will see another popup window with your desired call to action phrased in a way that is congruent with their “yes” action before. Something like: “If you need even more of the relevant up to date information on what you just read, to make sure you succeed, enter your email address and we’ll send it to you immediately.”
This will probably convert much better than doing the same without the first commitment action you asked them.
Whether you want them to opt-in to your email list, or a continuity program, a higher and more committed opt-in rate is desirable.
Don’t use forced continuity (lots of refunds, complaints, payment processors don’t like it, etc.), or opt out. In both cases, you have one option that is checked. This is not as strong because it is a passive decision by the customer, and he is not making any real commitment to this choice (and he will opt out quite quickly.) Instead, give him two options to choose from. By making him “declare” his choice, he will have a higher degree of commitment. To further enhance this, also show him what he’ll lose by making the wrong choice, for instance: “Yes I need continuous help and today I will get the monthly membership for 30% less” and “No I never need any help, and I don’t mind losing the special 30% discount price and paying 50% more when I do need it and want to join.”