I'd say you are mistaken on 3 counts... but that doesn't really matter because the topic was Tangerine's $500k limit that applies to everyone, not just RFD members.
My post was about why someone may have $500k in cash they want to put into Tangerine. Not an RFD member, just a Tangerine customer.
I operate this way. My brokerage account cash is never positive. I move cash out to EQ/Tangerine. No, I'm not hitting the $500k limit