So many bands work so hard to attract new followers. But when they do get you as a follower, they kind of ignore you. You are given the option of either buying something or just sitting in the corner and watching them work to get more followers. Their attention is devoted to the people who don't appreciate them rather than to the people who do.
Even when it seems like they are doing something special for their fans, there is a catch. "We have a special behind-the-scenes video for you! And we will show it to you if you first spam people with this message and get us up to X number of followers!"
Instead most of your posts should have the vibe of "We appreciate you giving us your attention. Here is something we thought you might find interesting."