6 would be more achievable.
In all the years I've ran the RPLP competition, I don't recall anyone getting all 10 results correct. Obviously that's 1 person picking 10 results, and this is 10 people picking 1 result, but it's still a huge ask.
I say we go with 1 game each regardless of how many people we have then more can join in following weeks to bring it up to 10.