Its self perpetuating, the more you offer the more they want, been going on in the B&B trade for years and was started by tourist board inspectors telling you, you need to offer this, this and this to get x number of stars.
Guests looking for accommodation, see a reasonable 3star graded one, with 5star reviews and think its good value because of its price.
Guests looking for accommodation, see a 5 star grading and 5 star reviews and think that it has to be the crem de la creme no matter what its price is.
According to ABB we all have to be 5 star guest rated accommodation providers, but no one's been officially graded, Then we have "SUPERHOST" thats like saying, dear guest, I'll kiss your feet and be your personal servant. The guest has no idea what to base the review on. It will kick everyone in the bum in years to come.