Most bonuses we have found online are quoted in USD or EUR for fiat currencies, and BTC for cryptos. That being said, this is often just a convenience thing in terms of the user interface, with the advertised bonus amount generally being available in all currencies the casino offers.
What that means in less fancy talk is that while not explicitly advertised, there are indeed plenty of USDT bonuses around.
Bizzo for its part also converts bonuses into USDT should that be your preference. Instead of the 100 EUR mentioned in the bonus package, players can just as easily claim up to 100 Tether tokens plus the specified 100 free spins. The prerequisite is a deposit of 50 USDT, though of course you can deposit more if you want to collect on the full value of the bonus.
$500 (or USDT) waving at new customers who register at Stake. The 100% welcome bonus up to a maximum of $500 is only available with the bonus code “casinoguide”. The first deposit must be at least 50 euros, or an equivalent amount in another available digital currency, and must be made within 24 hours of registration.
And at Cloudbet too you can get welcome bonus cash coming in at 50,000 USDT, plus the complete package of 200 free spins with a Tether first deposit. You have 365 days to claim bonus after the deposit and the bonus is withdrawable immediately; no wagering requirements.
In other words, most providers are very generous and do not leave customers out in the cold who prefer Tether to other cryptocurrencies. Just make sure you always check the bonus conditions, as they can differ quite a bit depending on the casino, and therefore affect how easy they are to complete. From our experience, an up to 40X wagering requirement is generally fair.