Let us say I have a website A. I write slightly twisted version on wordpress and blog spot and say source < link A>. That gives me a link. I can multiply this 10 times and get 20 link. Is that a good strategy ?
Links from same blogspot/wodpress/or any other source, is not great strategy. Work to get links from different URLs, sites, blogs preferably on diff 'C' class IP's, they'll help. Links built naturally work the best. /G
same sites link to same sites will be supposed to cross-linking and Google will devalue these links. And you may get penalty for these links. Read it carefully in Quality Guideline in Google Webmaster Tool.