While the extension does offer some added flexibility, there’s likely a very pragmatic reason behind it: the longer you have to restore your account, the more likely you are to come back. People who deleted their accounts in a moment of outrage (say, after a privacy breach) might not feel like they have to commit to that decision knowing their data will still be waiting for them weeks later.
There is a downside. If you are bent on deleting your account, Facebook won’t truly scrub your data for another two weeks beyond its previous grace period. You’re not very likely to see a breach during that interval, but it could be frustrating if you wanted to wash your hands of the service.
, 2018-10-03 20:36:00
Content from https://www.engadget.com/2018/10/03/facebook-increases-account-deletion-grace-period/