A guesthouse with 7 reviews averaging 10.0 — book with confidence? What about a hotel with 1,200 reviews averaging 8.1? Instinct pulls toward the perfect ten, but a small N is exactly the risk: one enthusiastic friend of the owner can outweigh the honest picture.
We flag a card “not enough data” when the weighted review volume is below 50. This isn’t a penalty on the index itself — the index is still computed — but the “Book with confidence” verdict automatically drops to “Check it yourself” in this case: a high but unconfirmed result doesn’t earn a confident green badge.
A newer layer adds recency: a review’s weight depends on how recent it is. A review from the last 3 months counts more than one from 6 months ago, which counts more than a year-old one; very old reviews barely move the needle. The reason is simple — hotels change. New management, a renovation, new front-desk staff — a brilliant review from three years ago says nothing about what awaits you next week.
What to actually do when you see the “thin data” badge: don’t auto-reject the place — read the last 5–10 reviews yourself. That’s exactly what “Check it yourself” invites, as opposed to “Be careful”.
Honesty cuts both ways here: a low index doesn’t always mean “bad hotel” — sometimes it means “we don’t have enough proof yet”, which is a different claim entirely. ⚖️