I wonder how far outside of the TV and FM ( and by FM i mean the radio dial. ) spectrum the receiver is able to capture. I am thinking the driver or the software might be able to be hacked and you could use it to monitor and or rebroadcast other transmissions like a police scanner that you could stream to the web.
You could probably set up a hell of a surveillance feed with those lol. Just grab a bunch of analog surveillance cameras and go all 1984 on yourself. Or, you could grab 20 PCI video cards and be able to run a 20-something monitor setup from your desktop : )
Honestly though, something like that could actually be useful for setting up a rotating live feed of some event or location, like say a festival or even a zoo/wildlife park. Just set up the computer connected to the expansion rigs to rotate through the cards, and broadcast the active video signal. Beyond that though, I can't think of much use for what is essentially a multiple expansion for a dead card format.
I look at this thread and it reminds me of the time I bought a pallet of obsolete computers from eBay for £300.
By some miracle I refurbished and sold one at £50. They were all complete junk. I count myself lucky to only have lost £250 and not the full £300.
Do yourself a favour and accept your first loss on all this junk. Luckily it sounds like you didn't pay. But even so, dealing with this is going to cost you a huge amount of time and effort, you'll spend forever trying to find some far fetched situation where this stuff is useful, and it probably never will be.
I was a teenager when I wasted all that time and money so it's all good now. I learned from it and got myself a job off the back of that knowledge. But if you have any kind of a job already, your time is too valuable for this crap.
PS. The sound cards are worth less than postage. Can't believe anybody would offer to pay postage for those. But I only say that because I myself had a bunch of those that came out of the PCs. It's easier if you throw one away at a time.