I want to start a deal aggregator website. I'm aware of certain solutions like Premium Press Coupon Press, WPDeals.
These solutions allow to create a directory with deals.
But is there any way to automatically aggregate deals? Without having to manually inserting them?
How other websites of aggregation and price comparison work? Manually? Or they do it automatically? Is it possible and how can be done? Is there any theme or plugin in WordPress, premium or free, that can do it?