Tether Papers: This is exactly who acquired 70% of all USDT ever issued
"We’ve spent months cataloguing and investigating every single USDT ever sent to and from Tether, across the eight blockchain and layers on which it currently exists: Omni (Bitcoin), Liquid (Bitcoin), Ethereum, Tron, Simple Ledger Protocol (Bitcoin Cash), EOS, Solana, and Algorand. Here’s what we found."