Your comment is misinformed.

You can simply configure a single account, or multiple accounts, as you wish. You link sites to accounts so you can control both spending and risk (commonly you don't want site-A slashdotting to affect site-B). With a single account you can limit your financial exposure across multiple sites.

Perhaps refrain from commenting about things you are ignorant about.

I've been a NearlyFreeSpeech customer for many years and its a great service that I can highly recommend.