Because they either haven't checked their email, have checked it after the 14 days have passed, have set their email to a random bit of text / lost access over their email account, had their account hacked before the notification was implemented or blocked it via the aforementioned means and have not posted / PMed a BTC address or PGP public key in order to recover it.
Since I never stake any bitcoin address here, so I guess my hacked account is 100% unrecoverable.
Yes, I can email/pm theymos and every other person in charge but I don't think they will entertain me.
They will probably laugh in their hearts and say within themselves, "Ha ha haaa, serves you right, Dorky, for not staking your bitcoin address here. Tough luck for you. There is nothing I can/will do about it."