The reply rate in Italy is extremely low, but if you reply, the gifts are plentiful!
My experience tells me that for English clubs, sometimes sending an email is enough; but the gifts are relatively monotonous, usually posters and brochures introducing the club. Clubs like Arsenal, Liverpool, Tottenham, Charlton and others are all good. I've received them all.
Germany used to be pretty good, but now it’s stingy.
There are also good clubs in the Netherlands. Eindhoven, Ajax and Feyenoord are all ideal places for beginners.
It is said that clubs in Northern Europe have a high response rate, but I have not tried it.