virtue-purchase
Similar to virtue signalling but done by means of buying trendy goods or services so as to display one's sense of contrived self-superiority: items such as books by politically correct authors, garish artwork purported to save rain-forests, or FairTrade coffee that makes the buyer feel woke; faddishly leftist buying habits that conform to intersectionality and other expressions of socially popular SJW pseudoscience, especially popular among university students.
Asheleigh-Meghan isn't going to actually read Michelle Obama's new book. She just bought it to put on the coffee table in case one of her black classmates shows up unexpectedly. It's more of a virtue-purchase.