File posters would be safer to use a different account to their main downloading account, and a small Usenet-News account is perfect for that.
You certainly don't want to pay for a multi-month account somewhere and then get your account revoked (and unable to log in at all) because you were accused of posting copyrighted material.
There's been quite a few Giganews users who have reported losing their accounts that way, and not just posting access, but the whole thing.
So with Usenet-News, you only risk losing $2, not $30.