Why do you think Pope Pius II might have been so generous to Giovanni de Medici?

Giovanni de Medici was generous to the church

Explanation:

pope Pius II might have been generous to Giovanni de Medici because Giovanni was generous(gave money) to the church and this helped Pope Pius II become Pope.  the money given to the Church by Giovanni de Medici  helped build the church to a standard and organize the required crusade by Pope Pius II to push back the Turks who had taken over Constantinople and also threatening to take over Europe therefore putting Christianity at the risk of extinction.

The Pope was very pleased with Giovanni de Medici for his numerous contributions to the church and this might make him generous to Giovanni de Medici.

it affected it because the kingdoms (with trade) slowly got richer and richer.