How Is the Queue Bloodpoint Bonus Calculated?

So like survivor queue says 2x bloodpoints. Does this stack multiplicatively or additively with other bloodpoint bonuses?

For example: 5 Bloody Party Streamers, I earn 100k bloodpoints during the match. I earn 500k bloodpoints because of the 500% bonus from the BPS.

Then we add the queue bonus of 2x bloodpoints.

Does this double the original 100k bloodpoints to give me 600k total, or does it double my bloodpoint total after applied bonuses to give me 1m bloodpoints?

I ask because bloodpoint offerings use percentage increases like 50%, 100% etc. but the queue bonus uses the x symbol. So in my head I'm assuming this signals that the bonuses apply seperately and gives me the larger amount of bloodpoints. But maybe I'm reading to much into it and it's just a weird continuity error.