What is event "weighting" referring to?

[bitparity]

Looking at the on_actions file, I was wondering what the weighting numbers represented. At first I thought they were percentages, but then I saw numbers with weighting of 10000, which just confused the heck out of me.

What exactly is a numerical weight referring to?

 

[Wizzington]

Percentages. It adds up the total weights and rolls a dice to see which one is picked. So if one has 10000 and another has 100, the first one is 100x more likely to be picked.