"Web portal Yahoo is planning to launch its own online music service later this year, despite its $160 million purchase of Musicmatch announced this week, according to music industry sources. Since late last year, Yahoo has been developing its own music player software, which will be underpinned by a subscription and download service provided by MusicNet, sources familiar with the plan said. Yahoo still plans to launch that home-built package by the fourth quarter of this year, despite its recent purchase of Musicmatch, those sources said. The Web giant is likely to run the two services side by side for some time before ultimately drawing on Musicmatch's technology and moving Musicmatch's subscribers into the Yahoo fold, sources said."Classic marketing strategy: have two different products "compete" with each other, but in reality, you own both and profit no matter which one the customer buys. Just look at the number of different types of Crest toothpaste on the store shelf for this tactic in action.