You need to give something in order to get something from me. For all I know there is nothing behind the email wall. I'm frankly tired of email marketing and I don't want my email collected and sold off.
Looks like this site tries to give you informed choices. Choices that can only be informed with personal data. I'm not giving up my personal info in exchange for sorting credit card offers. I can find and sort the offers on my own without becoming a source of revenue.