Hey, the passage you cite was related to the idea with average but it was mentioned that such a solution is not suitable. The reasoning why taking a number of contributions or the score only is not suitable are demonstrated in the following examples.
- Taking a number of contributions
- Let's have contributors A and B. A has 1 contribution with score 100 and B has two contributions with 15. B would be preferred although we can see that it is not right.
- Taking score
- Let's have contributors A and B. A has 1 contribution with score 100 and B has two (arbitrarily more than A) contributions with score 99. A would be preferred although we can see that B has presumably put more effort into the contributions.
Your comment, however, made me realise that taking a simple sum of the scores is not enough. But that could be also improved by taking the sum of scores powered to two, which will give contributions with high score significantly more weight but will consider the number of contributions too.