Sort:  

So If youre given a free drink with your meal the restaurant cant pay his supplier or does the free mean that you are not the one paying for it?

The ta haejin does in not complimentary. It's not water. He doesn't do that as a side bonus. It is his main course. Use a different analogy maybe?

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