there was ~ 350k USD on offer at flash rate when I made that first screenshot in reply to your initial post. (https://i.imgur.com/LWgazNR.png). In second shot (2 minutes or so later: https://i.imgur.com/Jc130LP.png) they were gone
Can you actually lend borrowed USD?
If so it would seem to me he's offering at higher rates now (0.23% to 1.0%), but that might also be other people, of course.
I'm not sure what this was and wether or not it worked out for him...
I don't think you can lend borrowed USD on bfx. Not sure, but I would doubt it.
btw, any bears out there can make lots of $$ by lending USD on bfx at rates like 0.1% per day. That's PER DAY.