Oh, now that I think about this, maybe they are promoting the use of converting to USDT/Tether simply as a way to protect against exchange rate volatility. Like, if she had cash already, and just holds the USDT received. Or maybe she did another local, in-person (face-to-face) trade selling the USDT for cash? Selling Bitcoin instead of Tether likely gets you a better, high price though. Who knows.