TrueTier
The page other catalogs do not have

Every one of these was somebody's lifetime deal

They did not vanish overnight. They stopped answering, one failed check at a time, until five in a row said the same thing. If you bought one, at least you know the date.

0stopped responding
0deadline moved twice or more
0unchanged for six months

Stopped responding

Five or more consecutive failed checks

Nobody yet

Every product in the catalog is responding. That will change over time and you will see it here.

The deal that never ends

The end date has been moved at least twice

Nobody yet

Nobody has moved the deadline of their deal more than once so far.

No signs of life

Site unchanged for over six months

Nothing here

Everything changes at least occasionally.

A note on fairness: a page that does not change does not necessarily mean a dead product. A finished tool that does one thing well does not need a new landing page every month. That is why this is marked as a signal, not a verdict. If you are the maker and consider it unfair, write to info@truetier.app.