Why a serious service might not publish a win rate

A published rate invites the reader to treat it as a forecast, which it is not, and at realistic sample sizes it cannot distinguish skill from noise anyway.

Sixty per cent over forty selections is statistically indistinguishable from fifty per cent. Publishing it as a headline figure therefore transmits confidence without transmitting information, which is a marketing act rather than a disclosure.

The absence can mean two opposite things: something is being hidden, or something is being refused. The distinguishing test is whether anything else about the product is independently verifiable.

What follows from that is less comfortable. A missing win rate reads as evasion to almost every reader, which is why very few services omit it even when omitting it would be the honest choice.

What to do with it. When a rate is absent, look for what replaced it. A commitment scheme and a published total count are stronger evidence than any percentage.