Glad someone asked, I wasn’t aware of this possibility, thank you @zz_tovarishch!! 
BTW, it’s pretty funny: given the currently available information, USDi could just be a glorified bridged USDT and we would be none the wiser. That why I still hold hope for (some of) the OP questions being replied publicly here for everyone to read and learn from them.
Love & Peace, Phroi
PS: On a positive note, DestBridge fees are really low compared to the 0.5+% of Rosen Bridge. Also, Rosen Bridge will never support USDT:
Clawback and freeze exclusion: The bridge commingles deposits from many users into shared custody cells. If an issuer froze the bridge address, all bridged representations of that token would become unbacked at once, affecting every holder across every connected chain. Rosen Bridge therefore excludes tokens with issuer-controlled freeze or clawback capabilities as a protocol-level policy.