I registered a couple of very nice one word .xxx domains in 2016 that were deregistered and later listed for someone else with GoDaddy. No courtesy email, nothing. Neither my (former) registrar or Godaddy cared.
Oddly enough.. that name is name available to register.. but really cannot be bothered after what happened.
EDIT: What they hey, jumped on it. Fingers crossed.. also email sent!
