Why is Amenities an enhancer and a query parameter too?

The enhancers are a way to add extra information to the response. By default, the hotels don't come with the list of their amenities if you don't pass the amenities enhancer. On the other hand, you can always filter hotels by amenities using the amenities parameter.

For example: &amenities=Lift,WifiService where in this case, you would only get hotels that have those two amenities.