I thought that the CCPA might finally let me see the lists I'm on, but instead, Mailchimp sent me more than 5900 files, scattered through which were the internal serial numbers of the lists my name had been added to - but without the names of those lists any contact information for their owners. I can see that I'm on more than 1,000 mailing lists, but I can't do anything about it.
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Mailchimp shows how a rule requiring platforms to furnish data-dumps can be easily subverted, and its conduct goes a long way to explaining why a decade of EU policy requiring these dumps has failed to make a dent in the market power of the Big Tech platforms.
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