Recently I received in my inbox an invitation to draw for a cruise "only" registering on a website. Like many users, I clicked thinking "a second to lose and maybe win" . The fact is that when I open the link I received the following form:
23 fields to participate!? I am not going to waste my time...
I think many users stop in this moment their check in.
In short, my advice is that if you want to do some kind of e-mail marketing action like this (highly recommended, to increase your recipients), be sure to provide facilities to your target. E-mail, name and surname are enough. Another actions will come to know something about them.
Knowing all the information about your recipients is great, but this is not the way. You can not ask for"blood". You take the risk that the e-marketing action don not get results.