historically luffy's grandfleet was cited as one of the feats he had before he got a 1. 5 bil bounty
here is oda talking about the 50 mil flat increase at the same time saying captains often get a bigger increase than individual members.
It also says he's sabos brother which i do boosted either of their bounties
Him having a fleet large fleet is what helped make him a yonko candidate tho i dont think it raised his bounty
Like what the wg will and wont raise your bounty for is dumb and doesn't really make sense half the time. Like for example luffy and law having extremely special fruits to the wg somehow doesn't do anything either
Yeah the captain usually gets the biggest increase because there increase comes from their own accomplishments only. Being captain they usually do the most too
The bigger their bounty gets the more large increases will trickle down to boost their subordinates as well
you just have to look at why buggy has that number
and its easy to see its because he is seen as a captain of very powerful people lmao
Its only crocodile and mihawk and we don't actually know when/how the increase happened
Luffy who has way more everything has an equal bounty to kid and law
Kid and law also have a higher bounty than bb who had a crew a bit stronger than theirs to say the least and is way more powerful. Because so far them defeating kaido and linlin with luffy is a bigger accomplishment than anything teach has done
Crocodile has a bounty not too far off teach a hes not even in the same ballpark as him in actuality when it comes to power and crew but he himself probably did something big