@Olof18 Many listings have a base price for a certain number of guests and extra guest fees for more up to the max guest count. This is done not to be in any way deceptive, but so that if, say, there are only four guests who want to book a place listed for up to 6 or 8, it is still affordable for the 4 guests, and for the host the booking would incur less expenses for 4 than for 6 or 8.
The extra guest fees normally cover more laundry, more cleaning, more utility usage, more things provided like toilet paper, soap and shampoo, coffee, etc.