You expect a good rating to predict your order

What the number is built from

Completed orders where a buyer chose to leave feedback. That is a narrower set than it sounds. People who received exactly what they expected often say nothing. People in an unresolved dispute usually have not left anything yet. People who lost interest are gone. What remains skews positive and skews old.

The gaps that matter

• The route. A vendor with excellent domestic delivery may have a very different record across a border, and the score merges both.
• The product. Scores are per vendor, orders are per listing, and a new listing inherits a reputation it did not earn.
• The clock. Ninety percent of the reviews may be from a period when the vendor was in a completely different situation.
• The account. Accounts get sold, shared and taken over. Reputation is attached to a login, and a login is not a person.

How to read a profile properly

1. Sort by recent. The last month is worth more than the lifetime average by a wide margin.
2. Read the negatives first, then read how they were handled. Failure is inevitable at volume. What tells you something is the response to it.
3. Look at the shape of the text. Reviews with dates, routes and specifics are worth more than a page of one word approvals.
4. Check whether the reviews match your own situation. A hundred happy buyers in a different country are describing a different service.
5. Prefer a vendor who signs messages, since a signature is attached to a key rather than to an account.

Where reputation genuinely helps

It is not useless. A long consistent record raises the cost of walking away, because a vendor who has spent two years building a profile loses something real by burning it. That is the actual mechanism behind reputation on any market, and it works.

There is also a shape of profile worth being careful with. A very high volume of very recent sales, on a profile that was quiet before, is a pattern that fits both a vendor having a good month and a vendor collecting before an exit. Nothing distinguishes the two from outside, and treating the surge itself as reassurance is exactly the reading the second case relies on.

What it does not do is protect the specific order you are about to place. The protection for that order is escrow, running on a clock, described in escrow is a neutral third party. Reputation changes the odds. The process is what covers you when the odds do not come in.