Make brewlette more likely to pick lower ranked users

[Jamiewarb]

Each user gets their rank of entries into Brewlette. E.G. Rank 1 gets 1 entries, rank 2 gets 2 entries, etc.

This builds a probability table of:
1 - 1.8%
2 - 3.6%
3 - 5.4%
4 - 7.2%
...
9 - 16.36%
10 - 18.2%

This gives Brewlette a 'Mario Kart' effect on the rankings, giving the lower ranked users a chance to catch up easier