The Skiller can decide whether he wants to give up to 5 minutes free. Its good in order to check if they match. And in case that the 5 minutes free was enough for the whole service the user can tip the Skiller and everyone will be happy
How do you prevent people from abusing this 5 minute grace period?
We don't. its up to the Skiller to give them. If the Skiller notice that the user is not serious he can end the call immediately.
I see. Is the call charged per second or?
It's probably paid per second yeah.
They did say that the first minute is free, where did you see 5 minutes? Maybe I read it wrong
The Skiller can choose if he wants to give free minutes, and if yes, then he choose between 1 to 5 free minutes
It makes sense it would have a max of 5 minutes because otherwise if someone wants to give it all for free, there would be no profit.