Don't they require a phone number? Even if they don't, they probably require email. I don't really want to give them my main email and even less - phone number. So, buying an account seems like less of a hassle, than figuring out where to get a temporary email.

They make it really hard to get an account, no matter how legit you are, but if you eventually get one, you can plug it into your own private Nitter instance.

These are all available for couple of cents per email/phone number. I don't want to advertise these services directly but they work very well and you can find them with keywords like "SMS otp code service"