What this is
On the same product, the same field (APR, early-exit penalty, lockup term) carries materially different values across the exchange’s API, web UI, announcements, and terms and conditions. Pennyworth resolves to a single authoritative value per evidence priority but keeps the disagreement on record. The point is not that aggregators got it wrong; the exchange itself disclosed different numbers in different places.
What it means for you
Even after Pennyworth has resolved to the most authoritative value, this trap should be read as a disclosure-quality signal from the issuer. Term changes, support disputes, and cap changes are often preceded by this kind of cross-source disagreement; treat it as a stability discount on the product, not a precision issue on any single field.
In practice
A CEX USDT flexible-savings product: the web UI shows 6.5% APR, the API returns 5.8%, and an announcement page advertises a "7% promotional APR." Pennyworth records 5.8% per evidence priority (API plus terms and conditions) and surfaces this trap. Two weeks later, the product’s APR is cut to 5.2%, with the announcement posted two days after the change. In retrospect, the three-way disagreement was the earliest signal of the impending revision.