Sure, but I was specifically referring to a marketing context. We maintain pretty robust customer databases and our needs are much different. Just proving you

Sure, but I was specifically referring to a marketing context. We maintain pretty robust customer databases and our needs are much different. Just proving you are a unique device isn't useful in most contexts if we don't have good or reliable ways of associating it with existing profiles. Notice that none of their customers are marketing companies. What this site won't tell you is that fingerprints have a half-life less than 24 hours (when you lose the fingerprint). Useful for anti-abuse measures, somewhat useful for ad-attribution, absolutely garbage for long-term tracking.