In my personal view it didn't go from "it's a scam" to "it's legit," either.
It didn't start out with "it's a scam," it started out with "BFL is employing someone with a criminal background in an unknown job function," and that is ALL anyone knew about this. Sonny being the CEO, being in charge, violating his parole by accepting funds directly, or having control of the money or company and able to run off with anything, was never anything but speculation.
That "unknown job function" changed to "He's not the CEO, or in control of money, and all funds are protected using standard corporate controls and business banking practices," which, to me, means Sonny's past history, or current involvement, is irrelevant.
However, this only means that I can trust this business as much as I can trust any other online hardware business that has a history of selling products.
I'm sorry, but your carelessness worries me. I don't understand how you can trust a scammer just because he said something in an interview. What did you expect him to do? Of course he tried to refute all accusations (saying that he's not the CEO and he doesn't handle money in BFL etc). He would be a poor scammer if he didn't. If I was a scammer, I'd do the same thing.
Yes, there is a non-zero chance that BFL is legit. It is up to everyone to decide how high this chance is, but after everything that happend in this community, I'd expect long time members to be more careful.