There's calculated risks (Michy) & throwing money at the wall (Baba) in the hope it sticks. Piatek came from the Polish league with decent numbers despite playing a weakened league, but there was no fanfare about him from his fellow countrymen, let alone those outside. Players can't solely be judge on form, as it's temporary. Just look up Diagne (has 20 in 17 league games and was once on Juve's books). Where's the queue for him? Piatek won't be short of suitors, should his form carry over at Milan.