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RealNetworks Ends Download 49-Cent Promo  SEATTLE (Reuters) - RealNetworks Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=RNWK.O target=/stocks/quickinfo/fullquote"&gt;RNWK.O&lt;/A&gt; is ending  its 49 cent-per-song music download service but will keep the  promotional prices in place for top 10 songs, the Internet  media and software company said on Thursday. 
