There is really no legitimate reason why MintJellyToes would not be able to allow Sebastian access to his polinex account, at least not in my eyes.
are you kidding! give a random person on the internet access to your funds on an exchange?
do you give randoms on the street access to your online banking too?
i think its pretty clear no one has claimed those funds as of yet, and MintJelly showed ample proof that he owns those funds.
Sebastian is just turning the blind eye hoping MintJelly gives up and he gets to score the funds.