I had a correspondance with SiliconDust (HDHomeRun) regarding a CI card equipped network tuner for DVB-C. YouSee (Denmark) is using CI to controll access to their TV offerings when not choosing the "off-the-shelf" products. And the off-the-shelf TV channel bundles are slowly being replaced by must-carry channels combined with CI card based pick-your-own.
Credits to them for quick and interesting responses:
"There are still some providers using the older CI standard, which is solely for access control (making sure channels are only available to people who subscribe to them). However, most cable providers in the rest of Europe (e.g. Ziggo in the Netherlands, Telenet in Belgium, Vodafone in Germany, Com Hem in Sweden, and UPC in Poland, Romania, and Switzerland) have moved to the newer CI+ system. We've done some math and it just doesn't make sense for us to make a CI-only product. "
SOOooo.... siliconDust is not planning a CI-only product.
They also told me about issues with CI+ (which contains stricter DRM options), making a network tuner with CI+ problematic.
Unfortunately, this aligns with user "pünktchen"'s observation for Germany "There's no pc tuner available on the market that accepts a CI+ card. ".
It seems DRM issues are spoiling all the fun for us geeks.