Lead nurturing, marketing automation, whatever you call it may well be p*ssing off your prospects.

Your customers dont want to feel like another name in a CRM with a £$€ attached to them, they are not interested in automated, cookie cutter emails about how you solve x for y.  

Your prospects and customers want to be treated individually and expect it if you want them to part with their money.  

Its getting easier and easier today to automate everything, chatbots, IFTT, Slackbots, the list goes on, but ultimately sales and marketing still comes down to human to human dialogue.  

Best practices I would argue dictate you want to avoid angering off your prospects before you even speak to them one-one