Even if I take a game from someone, I do spend my own time to analyse them and make out my own edit, which is why in some cases you can see two people who share a game, one winning and the other losing due to the little edit that was done in that bet slip.
Moreover, even if my friend gives me a game I will not be bothered to check and edit it because I believed that the person takes his/her time to predict it. And again, most edited games end up cutting so it's better to play the game exactly the way it was given to you.
This reminds me of how I lost in a game that was given to me by a friend just because I felt I came in to football betting before him and at such I should know more better but trust me that doesn't really works that way, anyone predictions stand certain level of chances of winning, even experts picks has no guarantee, I edited the games my friend gave me by adding more games and changing some options but to my greatest surprise he got lucky that week his games played out and when he asked me if I played the game or not I lied that I didn't play the game because my predictions goes against me because of that I have learned not to edit games given to me by another person, rather I will play it the same way and as well play another separate slip predicted by me.