I've read about a lot of people having their Oracle free tier abruptly terminated with no reason stated and not allowed to download their data either. I wouldn't trust them after reading that.
As a precaution I am seeing that a lot of people are moving to a paid account without actually using any paid service.
In my use case I am taking offsite backups in the event that the service might be discontinued. I don't have anything hosted there that I couldn't stand to be off for a few days.