In otl the byzantines in 12th century signed many deals with states like Venice and Genoa. However this forced Byzantium to rely on western help. In fact it was a curse in disgust because although trade increased Byzantine merchants were outcompeted by Western European merchants and began to rely heavily on foreigners. Essentially it's economy depended on foreign trade.
So Wi the Byzantines sign no such treaties. Wi they refuse westeners advances for trade agreements and stuck with original investures. what happens is Byzantine economy remains strog. In otl this was the main reason for Byzantines fall it's economy got complelty controlled by foreigners. Thus wi this does not happen. Could we see a surviving Byzantine empire.
So Wi the Byzantines sign no such treaties. Wi they refuse westeners advances for trade agreements and stuck with original investures. what happens is Byzantine economy remains strog. In otl this was the main reason for Byzantines fall it's economy got complelty controlled by foreigners. Thus wi this does not happen. Could we see a surviving Byzantine empire.