Kirsten Bell's Jane Friedman guest post is a cautionary tale about paying a Bookstagrammer for a sponsored post and getting a review that misread her book, fake-looking followers, and zero sales - then a flood of spam from other promoters who spotted her as a mark. She paid to take down the post just to stop the noise.
The takeaway is practical: follower counts and engagement percentages can mislead, many "book" accounts mainly talk to other bookstagrammers, and paid Amazon reviews are a red flag. Influencer marketing can work, but vetting who actually reaches readers - and whether you're building an audience or feeding an ecosystem of hustlers - matters more than a big number in the bio.
(Shortened and summarised to avoid devaluing the source)