It is a cultural problem. I think the "younger" users don't use e-mail as much as they do other forms of "Internet" e.g. Facebook for authentication. Otherwise

It is a cultural problem. I think the "younger" users don't use e-mail as much as they do other forms of "Internet" e.g. Facebook for authentication. Otherwise, I'm loathe to give out my e-mail address because of spamming and data-collection.