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Yeah, this is some cloudflare-level "security" abused to the point where we enter this strange paradoxical state. Advanced features exist, but are not allowed to be used enough by anyone to actually learn them and use often.

Honestly I bet it's a learning algorithm that they used to identify bots, rather than something a human decided.

Spam detection algorithms usually have a training set. One of the features could have been "uses_feature_x", which, according to the training set, is known to have a high probability of being a spam bot (because humans rarely use those features)

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