Keeping a consistent brand, no matter how personal the account, is so important. People want to follow accounts that they can trust will post fairly similar art, because they like that art. You wouldn’t commission an artist who gave out a different-styled piece every time someone requested their services; in a similar way, people will not give you that follow if you remain inconsistent and unpredictable.
It’s not just bibliophiles who are making the most of the bookstagram side of Instagram, publishers and other publishing professions have seen the potential of a few great books pictures and are now using them to promote their own brands. But are the Instragrams of publishers as artistic and effective as those of bookstagrammers, or are they doing something different?