They are both the same right? And is it enough to submit articles to ezinearticles etc...? Or there is more to bum marketing and article marketing.
Bum marketing basically means that your marketing campaign isn't costing you money. Article marketing, YouTube promotion etc. can all be examples of this.
Article marketing is entirely based on using article directories for rankings/traffic. Bum marketing is a mix of everything, that is all free. For example, using Wordpress or Blogger, Squidoo, etc