I'm sorry that I haven't offered you 1 certain term while you asked for but I have provided some examples by which you can properly (and properly) state that one thing isn't free of charge without having to use a statement like 'The product just isn't free of cost'. https://free-parrots-for-adoption48035.thekatyblog.com/34926576/free-parrots-for-adoption-can-be-fun-for-anyone