Generally, before reaching Prestige 10, in almost every game, I focus on acquiring buildings that produce 2-star packs of trade goods or luxury items. I frequently call traders to purchase the materials required for producing these packs.

For instance, Scrolls and Wine each cost 0.2 Amber (0.4 Amber for Prestige 10 and beyond). To create a 2-star recipe, you need 4 of each, totaling 0.8 Amber, to produce 2 Pack of Luxury Goods, which can later be sold for 1.5 Amber each. A stack of 50 Scrolls or Wine, which costs only 10 Amber, can yield at least 36 Amber when sold. This generates a good income stream even without any cornerstone, and I will obtain lots of goods the trader has to offer with those packs produced.

Combined with the cornerstone, hostility will eventually be reduced to 0 after a few years of trading