PierrotLL :
With a different scoring system that avoid draws, you would win approximately 50% of your challenges. The draw reward is 50% of the winning reward. So you would earn exactly the same amount of recruiter points.
Dear PierrotLL
With a different scoring system that avoids draws, If you apply the rules of mathematics across all teams in the game then you are most correct and the mean % would be exactly 50%, well done.
However once we introduce the fact that some teams are very good and some teams are very French, I mean not so good. The above statement falls to pieces. The good side wins more games (possibly by winning an away game) as they are better and as such their percentage remarkably is above 50%, making the gvg challenges a little more fun and worthwhile.