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They're hugely different.

Whether or not you actually will sue, if you paid for services you have the power to sue (on the contract for services). And Google knows that. That gives you leverage that puts you in a much better position to get someone at Google to pay attention to your account.

If you didn't pay for services, you can't sue. You didn't give any consideration, so there's no contract you can enforce against them. (That's for common law jurisdictions; don't know about elsewhere). They can more or less do what they like. And Google knows that, too.

(IANAL).