Discontinued/removed games and DLC are having an effect on CV

When this site first started obviously games and DLC that had been discontinued and could no longer be tracked at the time via Steam's API weren't allowed for giveaways but over the years many giveaways have been made for games/DLC that are now no longer in the Store for whatever various reasons. I was talking to a friend the other day who has been using this site for over 4 years and has done over $3000 in giveaways and he said he has several games/DLC that he has given away that now are no longer in the Store and their value is now zero. We looked at the price history for these games/DLC and figured that he has lost a little over $100 in CV value. As time goes on this can become frustrating, especially for those who one day think they are close to raising a level but then get knocked down because one or more of the games/DLC that they gave away here a few years ago was removed from the Store. If Rockstar decided to pull all of their GTA products from Steam just imagine the outcry that people who gave away their games here would have!

I don't know if anything can be done about this but if I can look up the price history of a product that used to be sold on Steam and compare it to the date that the giveaway started for it and come up with its CV value then there should be a way for the system can do so too so generous people who gave away copies of Skyrim don't lose their CV if Gaben wakes up one day and decides that he doesn't want to sell Bethesda products anymore. Skyrim and GTA are extreme examples but even enough losses from low dollar and/or indie games and DLC that are removed from the Store will eventually make a dent in the CV value of an account. It seems to me that there should be some way for the system to cache these so that their CV value can still be applied. The number of games/DLC that fall into this category will only increase as this site ages and will eventually become a much larger issue than it is now.

Sorry I don't have a giveaway at this time. I just got out of the hospital after having major surgery and money is very tight right now. I will hopefully be able to make some again as soon as I'm back on my feet. I'm just asking for opinions on this subject. Am I barking up the wrong tree here or do others also see a potential issue that will only get worse as time goes on?

EDIT

So I see that there HAS been something done about this (thank you cbones) but I still have a DLC I gave away 2 years ago showing 0P. I will have to ask my friend if he got any of his back the next time I talk to him. Was this feature supposed to be retroactive?