You keep the Google Ads account. The free Google Ads audit has a block titled You own your accounts, with this line under it: you keep full access to your accounts. On Paid media, you own your accounts, with no lock-in, and clients keep their accounts.
We review your Google Ads setup only. All our audits cover Google Ads only, and you keep full account access. If an audit needs access, that access is read-only. It is revocable at any time and cannot change anything in your account.
The free Starter audit and the paid tiers are on the audit page. What 2002 means is in What does 2002 mean for WeAdU?.