X_SCRAPE_BLOCKED
Means
the site refused this client — the identity is spent
Typical cause
retryable, and it burns the session first. Retrying a block on the same persisted identity re-trips it every time: the flagged cookies are the thing being refused, so the retry has to arrive as somebody else or it is arithmetic, not a retry
Fix
the session is burned and the next attempt starts a new identity — lower rate: on the scrape() definition if this repeats