tephra only in tephra crater.... blast furnace only in gk... honestly the minor limitation to fishing is pretty tame by comparison since you only need to bring your monies to the jungle camp once and you'll have enough hooks and line for the rest of your days
and again as stated earlier, fishing (and indeed any resource generation (mining/woodcutting/extraction/butchery)) should be about acquisition of materials and not vendor trash for coin.
give fish guts more use, make players *want* fish parts more than they do now and you can then sell fish bits on the broker rather than to the vendor. lobby sv for a change to make fish more desirable and i'll back you 100%
also grats on another nerf to fish meat prices
-barcode