The price of an asset goes up when money is being poured into the asset. For many exchanges "money" means USDT, so it makes perfect sense that USDT would be printed before a rally, regardless of malfeasance on tether's part.
Thanks, I will have to read it carefully, but from the abstract it doesn't seem as simple as "increased Tether printing makes BTC rally." But if there is in fact a statistically significant correlation, I would personally wager there's causation and hedge my bets accordingly.
