It's fairly easy to spot if you follow the early replies to a popular account (like @Snowden). Many of them simply disappear from view.
.@twitter hides millions(?) of replies.
Example hidden tweet: https://twitter.com/alecstavros2/status/651131334476193793 …pic.twitter.com/1VIKG8AG1r
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What's interesting is that this seems to happen on non-popular accounts to, as the first tweet in this thread shows:https://twitter.com/taoeffect/status/651215054235242497 …
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