Perhaps they just didn't take the time to make a proper Delete Account feature. With relational data, it can be non-trivial to scrub out all traces of a given

Perhaps they just didn't take the time to make a proper Delete Account feature. With relational data, it can be non-trivial to scrub out all traces of a given entity. There are tricky decisions to make about what cascading effects such a delete should have. An easier approach is to "soft delete" by marking the account as inactive.