Could also be because you need to leave contact information in order for the SEC to contact you and get more evidence. Otherwise it goes to agent, and without much evidence, you never hear from them again. Also a difference between whistleblower and just pissed off/disappointed investors.
"An “eligible whistleblower” is a person who voluntarily provides the SEC with original information about a possible violation of the federal securities laws that has occurred, is ongoing, or is about to occur." https://www.sec.gov/whistleblower/frequently-asked-questions#faq-2
So you need original information to be a whistleblower, like witnessing first hand the C-level officers planning to rip off investors, or a recording or something like that.
Read #3 "In general, the more specific, credible, and timely a whistleblower tip, the more likely it is that the tip will be forwarded to investigative staff for further follow-up or investigation."
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