In the US, I'd suspect that the delivery driver was trying to scam a larger tip (hoping that I'd react to "I don't have change for this" with "just keep the change" or "just give me whatever change you have") out of me, and file a complaint with the store. I don't know if that's likely where you are, since I don't know your tipping culture.
He did try something along the line of offering me a ticket for reduced price next time I order.
But no, that scam thing is not common at all here. I'm not sure what to think of this one though. I've ordered from the place before, it's one of the last remaining authentic Italian pizzerias in town (the rest all server either the Americanized pizza dough, YUCK, or the dürum like dough in pizza shape the Turks and Moroccans make, not as YUCK as the American dough, but still not the real thing), and I've not had any issues with them in the past. But this was a new delivery guy. He wasn't Italian either.
I hope the restaurant is still Italian, and that it hasn't succumbed to being bought out by Moroccans or Turks, like the vast majority of pizzerias and snackbars in my city. I mean, I like kebab, but I wish they'd leave making pizza to the Italians.
Both Dutch Moroccans and Turks have integrated very well. They're true gifted Dutch entrepreneurs. Buying out restaurants and pubs seems to be working very well for them. I guess it makes sense. It can't be denied that there is discrimination on the labour market against Turks and Moroccans. By buying and running their own businesses, they can be free of that, and horeca business tend to change ownership a lot compared to say, shoe stores or supermarkets, making those a logical pick.
EDIT: As for tipping culture. Dutch are amongst the worst tippers in the world, and infamous for it. Where in a lot of countries a 10% tip is common, or even included in the price, a lot of Dutch people will not tip at all. I tend to give the pizza courier 1 euro. Admittedly less than 10% of total price but for Dutch standards, pretty normal, and I am to say euphemistally, not rich myself.
A lot of Dutch people will be scroogy enough to only tip if the delivery was made exceptionally fast.
Then again 1 euro isn't bad from the courier's perspective either. Maybe he gets paid 8 or 9 euros per hour. If he makes 50 trips in 8h, and they all give him 1 euro, he has earned about 6h extra pay, under the table, tax free.
Considering most couriers are highschool students / college students, I should consider tipping less, since they'll just spend it on booze and drugs anyways. </grumpy_old_man>