RankScience closes $1.8M seed -- and now only wants to replace human SEO staff if you don't have any

A couple of years ago YC-backed RankScience, which offers AI-enhanced SEO split-testing, put a few SEO experts’ noses out of joint when the fledgling startup brashly talked about replacing human expertise with automation. Two years on its pitch has mellowed, with the team saying their self-se…