The process is very time consuming for numerous reasons. There are some technical challenges which we still need to figure out how to overcome.
Long story short, there are too many price changes in marketplaces like G2A, Kinguin and GAMIVO. Recording data of a single keyshop can consume more recources than all official stores combined. We've pulled many clever tricks to allow current integration, but adding ability to filter & sort keyshop offers turns out to be really challenging. Not to mention other issues that we need to overcome, like supporting "two worlds" (official stores/all stores). There are two deal ratings, two historical lows, different alert triggers depending on users keyshop preferences etc.
We're currently working on keyshop integration in Wishlists. It may come with some limitations, but you should be able to view keyshop offers there soon. I can't give you exact ETA, to not cause any disappointments, but I will do my best to get this done before Black Friday, perhaps sooner. The team is also working on other long requested improvements, like new filters and dark mode. There is plenty of good news to look forward to 🙂