Being 22 and transferring between nations, we would have had to pay some training compensation for Pennington. That is surely a sign of confidence in his abilities.
Looking at Example 4 on Page 9, we might have paid up to 100k USD. However clubs can agree to less iirc. https://www.footballaustralia.com.au/sites/ffa/files/2020-06/19-0530%20-%20FFA%20Guide%20to%20Training%20Comp%20and%20Solidarity.pdf