They claim they do not use fingerprinting for user identification for advertising. Some people would say that this is a weaker claim than not using fingerprinting.

They have admitted to using those sorts of information for fraud detection to detect fake ad clicks, bulk account creation, or other malicious activity. I also suspect they do some clustering on this data to determine what accounts are related so if there is malicious behavior from a cluster of accounts that appear to be the same user they can act on the whole cluster.

But there is no evidence that they use fingerprinting for targeting advertising.