I have seen a couple in passing, including one that I procured and set up for a friend's coffee house, but the vast majority of them are just spam sources to the point where I am weighting them as such with spam assassin rules.
I have seen a couple in passing, including one that I procured and set up for a friend's coffee house, but the vast majority of them are just spam sources to the point where I am weighting them as such with spam assassin rules.