To answer this question directly, it is on how you understand the term “Viral Marketing”. Many young generation SEO Professionals underrate the original Viral Marketing Tricks because according to them, it’s just a waste of time, especially when its referred to a site that features traffic exchange.
Yes, I partly agree with them. Why Viral Marketing is not widely used today instead, new webmasters use direct promotion through organic SEO and link promotion? Webmasters today overlook the importance of Viral Marketing especially when you are dealing with a a blog or a moneymaking information site. Without understanding the true meaning of Viral Marketing, one might ignore the use of it.
Viral marketing is not just a use of traffic exchange or click exchange websites. It also needs strategic ideas without the use of any third party sites.

Email Signatures, Forum Posting, Use of Special Scripts like “Tell a Friend”, Article