For eg inside the "tag" section (https://gg.deals/games) it should be interesting to add two tags:
"Delisted games" where which be added automatically games for which purchase has been disabled on Steam and/or sales page removed (but still listed on shops for sale)
(for eg: Grand Theft Auto: San Andreas, 007 Legends, ...
"Unavailable games" where which be added automatically games for which purchase has been disabled on Steam and/or sales page removed AND are no longer listed on any shop for sale
(for eg: Battlefield 2142, Mercenaries 2: World in Flames, ...
