[flai]

Spamming is always cost vs. cost.

Fuzzing the votes like this is cheap for reddit, but makes it more expensive for the spammer.

The best spam-filter is tricked by a hand-crafted, personalized email that is well-targeted. However, the cost of these are insane compared to mailing the same thing to hundrets or thousands of users. So anything any spam-filter ever does is making spamming less lucrative for the spammer, and fuzzing does that.