This makes sense of it. As we are all aware in this day and age under a mil for a player able to step straight into the PL is pretty much a free transfer.
From what I have read I don't think there are fees for Fati, we are paying 80% of his salary which is something like 12m although I have seen it as "low" as 9m. Regarding bargains, I think Mitoma at 3m is just brilliant