“The site, launched in 2014, offers investment advice to subscribers—the current cap is ten—who pay $3,500 per quarter for early access to a ranking of emerging and blue-chip artists. Like a brokerage analyst’s report, it uses terms such as “buy,” “sell,” and the even more alarming “liquidate” to guide clients. ArtRank’s algorithm arrives at its valuations through a combination of publicly available data such as past sale prices, forthcoming exhibitions, and social media posts from art world influencers as well as insider advice from collectors and dealers.”