As it stands right now I will be unable to support the flag based on the evidence seen so far in this thread.
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Going by what you wrote, it seems highly unlikely Sportsbet would scam 21mBTC after returning 427 mBTC
"Unlikely" is not a valid reason.
Assumptions are not a valid reason.
Make a decision based on something credible.
What I see that is credible is that they ignored him for so many days, and when he raised a flag Steve was able to respond immediately asking him to remove it - they do whatever they like these guys.
And you're not supporting the flag because it's unlikely for a large bookmaker to scam a small amount of 21mBTC.
You're just a puppet.