Why anonymity sometimes protects a participant
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For some participants, particularly those in a vulnerable position or facing real personal risk for speaking out, remaining anonymous or using a pseudonym allows them to contribute to a campaign without exposing themselves to consequences they cannot safely absorb. That protection can make genuine participation possible at all for that person.
Campaigns that offer a genuine, well protected option for anonymous participation make it possible for more people to contribute safely, which can strengthen a campaign's overall base of support without requiring every participant to accept the same level of personal exposure. A wider base often follows from that safety.
Respecting a participant's choice to remain anonymous, and never pressuring someone to reveal their identity against their own judgement, is a basic and important part of running a campaign that genuinely takes participant safety seriously. That respect should never depend on how the participant's identity might be useful to the campaign itself.