I am aware you have your own tool to get a winner but maybe you would like to try my tool on https://hivetools.herokuapp.com/picker/. Script automatically excludes from lottery double comments (counted as 1 entry) and bots. Try and maybe you will like it.
Charlok minotaur :)
You got an interesting script... :) Maybe you could add some fancy colors, logo, etc... Just to make it more sexy... :)
Hmm, I am very bad designer but will take this into consideration.