A local radio station where I live did something similar to this. They started following everyone with a connection to either radio or the area. It started out

A local radio station where I live did something similar to this. They started following everyone with a connection to either radio or the area. It started out as a decent account--someone at the station replied to tweets, followed new people and so on. In return, they garnered a good few hundred followers. Then suddenly, their "following" count decreased to zero--they unfollowed everyone they'd been following. Now it's just a one-way broadcast, a few promotional slogans and plugs for programmes getting sent out every day. Weird.