By default, it applies the vanilla reductions to cooldown (15% per stack, 50% for first gesture) in an exponential manner to the windup duration of Crowdfunder. Both of these values can be modified in config.
You can also modify the base windup duration, as well as the maximum frequency (I think this affects how fast it fires?).
It's disabled by default, but there's also config for applying attack speed to Crowdfunder's damage if you really want to further buff one of the better equips in the game?
Other Notes:
I know the first shot of Crowdfunder doesn't apply the changes, I could only get into the Crowdfunder's owner CharacterBody by placing it after orig(self) so there's not much I can do to fix it
If you want to give feedback, I've got a server for RoR2 projects here: https://discord.gg/xjAWykGByy
(if that link doesn't work for some reason, you can also contact me at FMRadio11#8912 on discord)