Indeed. Apparently coffee sauce and coffee syrup are interchangeable and (so google tells me) are not sweet.I'm with @vickster. I'm not interested because I like the taste of coffee. I'm also suspicious of concentrated flavours, as they can taste pretty manky in my experience.
I'd also be suspicious of this. Syrup is sweet by definition.
I had a coffee this morning and got the syrups out to choose one.
I chickened out and had straight coffee.