When an affiliate program closes down or 'suspends' their operations indefinitely, how long do you wait before removing all of their links?

We just got the email that another program (FierceDog) has closed its door earlier after having gone to a GoDaddy landing page for the last few days and im wondering if the fact it had a landing page showing on the domain should have been enough warning for people to remove their links or if you actually do wait until you get 'official' notification that a program is closing?

I know the site owners have been trying to sell for about a month or two im guessing those searches for a buyer were unsuccessfull (primarily due to the asking price)

Regards,

Lee