Even if they did consult specialized lawyers, you don't really know if it works until there's an adjudication.
Unless they worked with the SIPC up-front to ensure that these funds would be covered, and that the SIPC actually, you know, has the means to cover them, then the only way account holders are going to find out if their are protected or not is in the aftermath of a crisis, after a long and drawn out lawsuit.
When I saw the headline, I thought about signing up but hadn't gotten around to reading the fine print.
Glad I didn't waste my time.