Do you have evidence - in writing - to the contrary from a Google official?
Abridged wording and my non-lawyer interpretation below in case I'm not clear:
> Every app that [accesses Gmail and also accesses other servers] is required to go through a security assessment from Google empanelled security assessors. [...]
> In order to maintain access to restricted scopes, the app will need to undergo this security assessment on an annual basis, [... costs usually] between $10,000 - $75,000 (or more) [...]
> This fee may be required whether or not your app passes the assessment and will be payable by the developer."