Sort:  

Following your logic only things worthless could be given for free.

If i give you something and dont charge You it is free for you.even if somebody else pays me for it!

Haejin said free, not me. I guarantee no one pays for haejin to draw line on a chart. 'Free for you' isnt not free though. Haejin didnt say 'free for you', he said 'free'. So it was him, not me who is incorrect