Craigslist tries to stop spamming by checking for duplicate submissions.
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IP proxy sites are used to post from a wide range of IP addresses.It's not clear yet who will win.Other desktop software products are AdBomber and Ad Master.They check for excessive posts from a single IP address.Craigslist hasn't countered that trick yet.Chartelligence Overlays Panda Updates On Your Analytics.Home Tag Cloud Tag: tools, most recent entries: Search Buzz Video Recap: Google Core Update Confirmed, New Search Snippets, Bing API More SEO.May 29, 2009, click Forensics's Software Promises Conversion Predictions.A tool called CL Auto Posting Tool is one such product.September 24, 2009, linking Badly?October 14, 2009, google AdWords shelbyville tn escorts New Beta Keyword Tool.Txt Tool August 17, 2007 Tools to Check a Sites True Google Toolbar PageRank Score May 3, 2007 Feedback Suggestions For Google's Link Analysis Tool February 8, 2007 Listing of Some Free Keyword Suggestion Tools February 8, 2007 New Free Yahoo!Its latest gimmick is phone verification.Spammers reacted by using VoIP numbers.

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CL Auto Poster isn't the only such tool.
Several commercial products are now available to overcome those little obstacles to bulk posting.