He had presumably used it for 10 years successfully. Surely he gained some expertise over that time period.

paxys 7 hours ago | parent | next [-]

He probably just got a new competitor in the space. Easy to see good returns on online ad spend when all traffic just goes to you by default.

	▲	theptip 2 hours ago \| parent \| next [-]
		Ad noob here; how would you test this hypothesis?
	▲	grugagag 5 hours ago \| parent \| prev [-]
		Or returns gradually went down until it stopped working altogether.

5 hours ago | parent | prev [-]

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