... when you wish you had gone with PostgreSQL.
We received an email from Oracle saying that we either had to renew our support contract with them or else terminate the license altogether (and thereby lose the ability to run our production database) because we had a master contract covering other applications in our enterprise, and our decision not to renew the support contract for this application was in violation of this master contract.
The best part is that we are using the database as a plain vanilla data store; no -- ahem -- leveraging of advanced Oracle features.