• @kalleboo
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    31 year ago

    I always assumed they just called every single number randomly. Since you don’t pay for failed calls, the cost is zero.

    • @[email protected]
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      fedilink
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      31 year ago

      Some likely do, but there are other types of responses they will get that do cost. Such as answering services, fax machines, and even dialup endpoints. It’ll always be more cost effective to use a shared list of “good” numbers.