I saying the actual costs of a room are near zero, forget about everything else. The only cost really involved in a room is the chamder maid in the morning which is negligible, compared to the other costs in a hotel. So yes, there is near 100% profit and a room.
It's because 70-90% of the hotels rooms are pre-booked and paid for by the big online companies at a steep discount thus guaranteeing occupancy, bearing in mind hotel rooms are virtually 100% profit, thereby leaving the hotel with very little inventory to sell for themselves.