drupflare/worker - v1.0.4
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    Variable OWNER_FAIL_LIMITConst

    OWNER_FAIL_LIMIT: 12

    How many wrong tokens one client may present before it is refused without an object hop.

    Guessing the token is not the threat (32 CSPRNG bytes, constant-time compare); the unbounded cost is: each presented token costs a /__ownercheck object request, the meter the free plan is scored against. 12 rather than 3 so a stale cookie in an open tab does not lock its owner out.