You are completely wrong, any body can be a whistleblower, doesn't matter if the person works in the firm he or she wants to expose or not, what really matters is that, you know what is been hidden and can expose it accurately in details without mistake or misinformation.
Whistleblowers usually refer to people who work in the company that they are reporting. The ones who report them who aren't employees are in the minority which is why you are just partially right here.
And again, you are wrong, such experience as shared by the op changes alot of things.
First is, as someone intending to play on this casino, reading such experience from a high roller begins to give you reasons to doubt the trustworthiness of the casino, specially if you are a high roller yourself, you don't want to get yourself involved with a casino where your contributions to the growth of the casino won't be regarded or appreciated.
Incorrect! His experience might have influenced your opinion, but not many primarily because of his bad trust history and the fact that Bitcasino is a highly reputed site in this forum. Think!