For any credit card issuer, is there any evidence that forms of communication (for unique requests) other than a telephone call (chat, secure message, Twitter, etc.) result in lower risks than the risks commonly ascribed to human eyes on account?

Some people with notional biz credentials and multiple AmEx NLL biz cards and some people with many sock drawered SUB only cards and some people with several identical accounts and some people in general are hesitant to speak with a telephone representative out of concern for possible adverse action (shutdown, claw back, application denial) due to human eyes on account.

Any evidence that Chat or Secure Message have different likelihoods of resultant adverse action than phone calls? Any evidence that Chat or Secure Message don’t have the same likelihood of (supervisory or confirmatory) human eyes on account than a phone call?