One of the factors/examples that can negatively affect online reviews from users of vacation rentals is the fact that users had to buy more consumables such as tissues and soap during their stay. When a large number of guests stay, there is a possibility that more consumables will be used than expected. If there is a shortage of consumables, there is a high risk of discomfort for the users.
Of course, there is a limit to how much consumables can be provided for the vacation home owner/operator management. However, rather than having a shortage of consumables that don't cost much extra and make the stay unpleasant for the guests, I think it would be better to keep extra consumables in the room other than the standard ones, so that the risk of getting a bad review on online reviews would be reduced.
Making small cost savings is important in the business of renting out vacation homes, but if you get bad online reviews because you cut costs on supplies that don't cost much, it will take a lot of time and money to improve your reputation.