in the hay day of excelsior I once got fee straps a pen some pb2 and a lazerpointer.Sometimes though if you spend extra you can get a free pen even.
A bit ovet 10 years ago free samples was pretty common and it makes sense, if customers like samples they buy it.
These days I see shops sell single sample of many products for 2,3 or even 4 GBP but PN even had an offer for 10GBP! For DD I dunno is it just for fun?
Thats how you know you spend too much