I couldn’t modify the Google sheet for ‘unsupported tuners’, but I wanted to come here to say I got a dusty old USB PCTV 801e stick to work with my Raspberry Pi Plex Server. I’m able to watch live TV remotely (make sure to select original video so the Pi doesn’t have to try to transcode), DVR, etc. I hate waste, and to bring some very old hardware back to life has been awesome.
I had to follow this article to install the drivers, but everything has seemed to work pretty great. Pinnacle PCTV HD Pro Stick (801e) - LinuxTVWiki