I've been installing updates which includes a more efficient script to reset everyone's medal scores based on valid medals, along with the groundwork for some new API features you'll start seeing in use in the near future.
Right now we have 2 separate database tables regarding your medals. One stores what medals you currently have unlocked and is not biased to the overall functionality of a medal (such as the ones in fear unlimited), the other holds your actual medal scores.
When this new script runs it adds up your medal points for every medal that is currently marked as an approved and functional medal, and skips points for the broken ones.
If the authors who made the broken medals ever fix them, those medals will be worth points again and anyone who has them unlocked will have those points automatically added.
I do not have a list of what's all been de-approved in the overall list of medals, but I know there are a few games that only have one or 2 broken ones that are not worth any real points. The ones worth no points shouldn't show up on the game page, but will show up on your profiles.
There's still a lot of touch ups to do on the system overall, but we have been listening to the complaints about people cheating to get unatainable medals and we agree those unatainable medals should not reward people anything.
As I eluded to at the start of this post, we have a LOT of new stuff in the pipeline so addressing every minor issue with the medals may take some time, but know that the way things are set... if you unlock a medal and do not get points for it... you still have the medal linked to your acount and on the next score sync, your points should reflect that.