RealNetworks Ends Download 49-Cent Promo  SEATTLE (Reuters) - RealNetworks Inc. &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=RNWK.O qtype=sym infotype=info qcat=news"&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.