Edit: Isn't it a huge red flag that Tether doesn't make any money off transaction fees? Their daily volume is almost 2x that of BTC. They could fully support the company with a tiny transaction fee and avoid all the regulatory uncertainty/FUD. How does tether make money (aside from potential fraud)? Is there a transaction fee that supports the people and cost of running tether (the company)?
If I were running it as a 100% legal/safe operation I'd invest the balance in short term treasuries. If you multiply tether's liabilities ($61.9B) by the current 1 year treasury rate (0.09%), you get $55.7M, which seems like plenty of money to run such an operation.
Seems like it could be a decent business if it was legit.