[mothered]

Think it will not get blacklisted since never heard amazon doing or being able to do that

Generally speaking, It's not actually Amazon that performs the blacklist on the device per se, but more so the carrier when activation Is requested.

For example, If Amazon has flagged the device as a write-off (or some variant) and records the IMEI number, when activation Is requested It will come up on the carrier's records, hence deemed blacklisted.