First reason I must say that google does not like the wp-robot wordpress plugin. Unique and good quality contents are what you need to RANK. Dont use WP-Robot plugin ever in WordPress blog.
What is Wp-Robot?
WP Robot is an autoblogging plugin for WordPress weblogs. It will enable the user to create targeted blog posts on any topic without having to write anything. Blogs will be set on auto-pilot and fresh content will be entered on a schedule that the user specifies and the posts can be on any topic and will be targeted to any keyword desired. Content can be taken from any source including Amazon, Ebay, ClickBank, and YouTube.
Many People think they will earn money easily from this plugin. But that is not true. If you use wp-robot plugin for month you will get to know. Not single article is indexed by google.
Because Google will check the article title and content and That content is duplicate then google never index that page.
Your articles will never comes in picture. It might be possible in that blog you will right the your own articles but still due to wp-robot google will never index your article.
Google might ban your domain name due to wp-robots. Earlier this is happened with some domain names due to wp-robots.
So My advice to all bloggers dont use wp-robots ever.
To get the best use of WP Robot, you should also add relevant, original articles. There are other SEO methods you can use to get indexed by search engines. WP Robots primary use is easy automation of affiliate-selling content, not SEO.
but I saw many success stories of publishers who used this plugin.
Wp robot should be used as part of your site strategy, not the whole strategy. One screwdriver is not as useful as a complete toolkit.
as you said That content is duplicate then google never index that page. this plugin rewrite the content in this plugin more than 5 spiner is inbulit.. so there is no chance of duplicacy.
I am not agree with this point…search engine crawlers are smart enough to catch duplicate content even article is rebuild….