Nowadays, people are really coming to love bands and music and concerts. Posters are great items to preserve memories from those types of things, and are gaining popularity. Some of the most interesting posters are indie posters. Certain bands don’t seem to get a lot of attention from the mainstream crowd, but can put out some great posters.
Some indie bands may not have as many fans as popular music bands and groups, but they tend to be very loyal fans. So those fans usually buy lots of merch and love to get as much as they can to show their loyalty to the band or group. When they go to concerts, they buy stuff. Whenever they get a chance they will buy. And indie posters are one thing fans of indie groups love.