A few months ago we developed some functionality based on an unsupported non-production-ready service.
Unsurprisingly we are now in the process of re-writing the functionality to use a real implementation.
Hot tip for reducing the amount of time to deliver a software project - don't build on something that isn't going to exist when your system will be going live.
Coincidentally we have moved away from inserting fake data into our databases in development, QA and production environments. Fake data doesn't belong in our live systems.
Our application doesn't need to insert data into the system, so we no longer need our data access permissions to have inappropriate permissions.