Hello Germany! :-) What is the deal with the toilet paper?

I am an airbnb superhost in croatia.

I have now about 600 reviews and my score is 4,97. Top 5%.

Im not complaining, dont get me wrong. I dont care anout 8€ worth of toilet paper, but i am curious.

I hosted a family of 5 for 5 nights.

They managed to use 17 rolls of toilet paper, those big ones from Lidl.

What is the deal? 😅😅😅😅