p4n0s lots of deals don't have time expiration although they do on their stores (for example Steam)
We have plans to add this for Steam, but it mostly depends on data feed from store - if there is no info about expire time in feed, we're not able to display it on GG.deals (at least not without too much effort).
Do you mean any specific stores (except Steam) where this info is missing?
p4n0s *sorry if I'm been 'rude' or 'demanding', English isn't my native language.
No worry, you're not "rude" or "demanding" at all 🙂. We're open to new feature requests and bug reports, although we can't really fix and implement everything (at least not immediately 🙂).