they spawn "only" at coastal provinces with a fort .
you get at least one per turn , on average you get 2 / turn .
i guess they have a cost of 10 gold , so an upkeep of 0,67 .
if you control 10 coastal provinces you get around 20 / turn , that's ~ +13 upkeep / turn for something you don't want . this is huge .
a solution would be to not castle your coastal provinces but that would be very unfair since castling is a very loved play strategy
so plz either make them upkeepfree in the next patch or don't let them respawn anymore and make them recrutable or leave them out completely .
thnx in advance