People today are pressed for time more than ever before. Whether they are opting into your email list by filling out a physical piece of marketing material or going online, they are in a hurry. Do them a favor and make it as easy as possible to join your list and receive your opt-in gift.
In most cases a full name and email is all you really need from your subscribers. This minimalist email list-building strategy continues to outperform multiple information requirements time and again, year after year.
You only need to think about your own experiences to understand why.