If you are using your Myspace Music page for only online promotions then you are not using it to the full capabilities of its potential in offline or online music promotion. Of course the earning potential of each method of promotion is similar, by using play counts. This is a ranking system that is used to help rank the popular musicians regardless of any contractual status. The play counts are first organized by the music genre and then again overall for the site itself. The higher the total Myspace play count is the higher in the ranks you will rise. More often now, musicians seem to be using promotional tools such as these to power boost their play counts straight to the top of the charts.
Additionally it is important to remember to take advantage of all of the available software out there that can help you boost play counts while on Myspace or Myspace music. Anything that can get your music out there is certain to bring fans to you repeatedly. And perhaps as you watch your fan base grow, you will be able to determine where the most lucrative places for your group to play may be. The results of this type of promotion online can directly lead to offline promotions such as magazines, newspaper articles or even television and radio. If you have an impressive play count, then this makes magazines or newspapers a bit more interested in interviewing you and getting you yet more offline promotion capabilities. 
Regardless of this entire internet phenomenon you must always remember the one thing a good salesman never forgets, that word of mouth marketing is the oldest and most trustworthy form of promotion available for any individual in any business on earth. Without a satisfied person who enjoys what you produce who shares that with a friend who shares it with a friend, you may have disjointed fans here and there, but nothing that can expect to last as much as word of mouth will for ages. With that kind of promotion available to you, anything else, Myspace music or any other form of internet marketing may fall short in the big scheme of things!

