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Tippr Proposes "Open Deal Format", A Standard For The Group Buying Industry
Nov 18, 2010
<img src="http://tctechcrunch.files.wordpress.com/2010/11/odf.png" /> <a href="http://poweredbytippr.com/">Tippr</a>, which provides <a href="https://techcrunch.com/2010/06/09/group-buying-site-tippr