I’m not sure if I’m on to anything here but allies rulebook was likely made when prosperity2e was already planned. That said the suggested prosperity games included expand, kc, quarry, rabble, talisman, bank, city, mint, trade route, vault. I would find it strange that they would make suggested sets include cards they knew they were going to axe from the game within the year.
The seaside 2nd edition suggested sets didn’t include any of the axed cards.
That said I would be surprised if trade route or mint made the cut.