- Place ads that attract people who really don't care about them or their music.
- Pay services that boost their numbers using fake accounts.
- Post content that they are embarrassed to have associated with their name, but that is trendy today.
As a result, I know of bands with over a million followers on Facebook who could not sell out any venue larger than a public restroom stall.
Build a following of real fans and you will have a music career. Desperately increase your follower numbers through any means available and you will have a music hobby that you support with a day job.