This means that for every euro that you spend at a Meliá hotel, you’d receive 6 Avios instead of 3.
At NH Hotels, the number of Avios depends on the hotel category. Usually, you’d get 450 Avios per night at 5-star properties, 350 at 4-star properties, and 200 Avios at all 3-star NH hotels. These amounts would now be tripled, i.e. you’d get 1350, 1050, or 600 Avios, depending on the hotel.