Ad hominem again? The substance of a logical debate does not involve the personal attributes of the debating parties. Ad hominem is fallacious logic, and I will not succumb to your irrelevant demands for arguably pertinent credentials.
Further, statements such as "companies try to trim their costs by taking advantage of available no-cost resources" need no citation to authority because they contain inherent, self-establishing logic. Why would companies NOT trim costs and exploit a no or low cost marketing opportunity? When trying to counter an inherently logical statement, the burden of proof lies with the moving party, not the party making the independently logical statement.
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