We are pleased to announce that you can request emails when someone tries to access a password protected event. Prior to this we would only ask for an email address when we needed to, primarily when a user wanted to save something to their Favorites or to their cart.
Now the choice is yours. You can enable email capture in any Event's settings page.
Please keep in mind, especially for European customers, that it may not be legal (or appreciated) to market to people just because they gave you their email.