I find it hard to believe that no one is interested to use revolution slider for getting customers but only want to use it to make pretty place holders that take up internet real estate without having a function. So I did more research and found out that most people who build web sites do want to use them for getting customers.
I have found one way of doing this is to use pop up maker to make a pop up that opens from the revolution slider button and use gravity forms, bloom, or some other form builder to put an opt in in the pop up.
gravity forms display in pop up
Put optin pop up in revolution slider
That is one way of accomplishing this and I'm sure there are several other ways of doing it.