Yes they do work, Its the only way to actually own your audience. Rather than asking permission to access someone else's audience. For example, I get emails f

Yes they do work, Its the only way to actually own your audience. Rather than asking permission to access someone else's audience. For example, I get emails from some people for the last 10 years. I would have forgotten about them many times over. Having a Facebook page with a lot of likes use to mean you could get on their feed, now you are lucky to get any views without paying for them.