Affiliate Marketing Secrets

I see a lot of question here about buying Polaroid or Holga/Diana/Lomo cameras. Now back in the film days polaroid certainly filled a niche. What I just don’t get is why people spend money on a Holga or similar camera while for the same amount or less money you can also buy a used film camera, either a high-end compact or a decent SLR with lens.
So, can anyone explain to me why someone would buy a camera where there’s hardly any film for or why anyone would buy a camera that’s basically a poorly made toy?