His trial at Carlisle Crown Court heard that one of his victims complained to police about him persistently harassing her in 2008, three years before his arrest.
During that time he continued his pattern of behaviour in what the prosecution described as a "cold, clinical exploitation of the desperate and vulnerable".
His mode of operation was to target girls and women who he thought would rather have sex for money than risk jail by stealing to feed addictions to drugs or drink.
More top news
Danish inventor Peter Madsen has been charged with murdering Swedish journalist Kim Wall during a trip on his private submarine.
Was the government ignorant to Carillion's financial peril? Or were they using public procurement to delay it’s day of reckoning?
Hazardous Whirlpool tumble dryers have led to at least 750 fires since 2004, a House of Commons report said.