I'd seen Sadie a couple of times before lockdown... So can confirm she's genuine and gives a good service. But back then she wasn't asking for deposits.
Don't know how things would play out if you paid her a deposit. I don't think she'd scam you... but then I saw Eve Lynd / Redx before lockdown too. All was fine with her back in the day, but a recent review of her regarding deposits tells a different story.
I hope this won't become a post-lockdown trend of girls asking for deposits, as I think they'll be losing out on business...