The differences are the time of expiration of data:
Simple (1 Credit per ASIN ): Reverse ASIN Keyword Search (Only Keyword Position Ranks are given) - Data is Always Fresh from the Database (Search/Data Expires in 1 Week)
NEW!! Simple (2 Credits per ASIN ): Reverse ASIN Keyword Search (Only Keyword Position Ranks are given) - Data is Always Fresh from the Database (Search/Data Expires in 1 Month)
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