Dead users are just one of many types of 'fake' user. On it's own it's a small percentage of total active accounts.
But, I bring it up as the proxy for lot's of other similar estimates. I don't know if what % of 'active' accounts in their logs be that 0.1%, 0.2%, or 0.02% are dead, but I suspect they are going to pick a subjective number that makes them look better.
Further, because actuate numbers take a lot of accurate estimates even 'small' biasing of these sub estimates will compound and heavily bias their reported statistics.
AKA, spam accounts may be easy to find. But, spammers may create other fake accounts to mask their 'spam' accounts.
But, I bring it up as the proxy for lot's of other similar estimates. I don't know if what % of 'active' accounts in their logs be that 0.1%, 0.2%, or 0.02% are dead, but I suspect they are going to pick a subjective number that makes them look better.
Further, because actuate numbers take a lot of accurate estimates even 'small' biasing of these sub estimates will compound and heavily bias their reported statistics.
AKA, spam accounts may be easy to find. But, spammers may create other fake accounts to mask their 'spam' accounts.