Looks like a neat scam...
I remember years ago Prado Publishing of Spain had this similar thing where you could buy into the "Aircraft of the Aces" series of books and models. Every month you'd get a reprinted Osprey title, with a few pages of line profiles missing and a small diecast metal model of the aircraft featured in that month's title. You could choose either the books on their own, or the models on their own, or both together, which was the most expensive option. I opted for the books on their own option and I though it was a good deal, at around 7 quid a month it was cheaper than forking out 15 quid's worth of Osprey title. There were 60 titles. I've still got most of them.
I remember years ago Prado Publishing of Spain had this similar thing where you could buy into the "Aircraft of the Aces" series of books and models. Every month you'd get a reprinted Osprey title, with a few pages of line profiles missing and a small diecast metal model of the aircraft featured in that month's title. You could choose either the books on their own, or the models on their own, or both together, which was the most expensive option. I opted for the books on their own option and I though it was a good deal, at around 7 quid a month it was cheaper than forking out 15 quid's worth of Osprey title. There were 60 titles. I've still got most of them.