I used to read it when it first came out, this was in the late 70's/early 80's and I was a Screaming Eagle at the time; most of the articles were about mercenaries in Rhodesia.
I knew some of the writers(served with them), knew of the guys they wrote about, and knew a few guys who went to Rhodesia upon ETS.
I remember some guys waited eagerly for each issue, and then bought all of the latest kill gear. I will credit(blame) SoF for the adoption of the M92 Beretta.