F'n juice endorsements, how do they work?

How do juice endorsements work? Do they help the rate that you gain juice, or only how much you start with?

what you start with...

GOLD: is almost 40%

yea just when u start it gives u a boost. but then in over time + ur gold juice endorsement is nice.

I don't know why, or if it was told not, but I thought you got more juice from kills/picking up juice with a Juice Endorsement? Thought that made sense.

It would make more sense to affect the rate it increases, but no, it just affects what you start with, it's why I stopped using it except on my support.

That does seem kinda weird, who cares with starting off with more? *Other then Supports that heal*

i swear it increases the amount you get because because i dont know why but it seems like i almost get double juice with the perk on