Sony: Publishers will decide PS3 to PS4 game upgrade fees

[Somini]

Euphoria14 said:
Wait, so does this also mean:

1.) Buy game on PS3 for $60.
2.) Get PS4 version for $10.
3.) Sell PS3 copy for $40.
5.) Profit

?

You spend 70 in this example and get 30 back. Where is the profit?