Lately i have found my self at outposts with another crew for any number of reasons, be it they showed up after me, i found my self turning in, or they sunk me when i didnt realize and we end up having a chat (oddly specific, i know). Something i have found my self compelled to do when i find my self in these situations is buying some supplies and giving them to the other crew for their journey.
I know this is a lot like the "karma crate" idea, but it feels more active and personal. Something i propose is, in those moments outside of action at outposts, to those who have the spare gold and the will to do so, gift forward some supplies when you can! It seems to be a way to brighten the day for other crews, and if it becomes popular then it could become a nice informal gesture to come to the seas.