Damn, you've been busy.
If it is just the store taping two packs of toys together with some packaging tape, does the combinations really matter, or can some likely examples do?
The early stuff was generally not something done by Hasbro, but just a marketting gimmick by the stores (taping up their own 'bonus packs'). I think it usually came down to what assortments were out at the time that the stores got from Hasbro, but as I recall, it was usually fairly random with no intentional pairings. I personally avoided buying any of the bonus packs, because the way they taped the carded figure onto the boxed figure, it made it impossible to separate the two without destroying the packaging (which I keep).
I'll have a look into this as well, to see if there are any actual pairing examples recorded anywhere. Actually, I've been keeping the occasional junkmail advertising over the last few years, so I'll see if I can find any photographic examples as well.
If anyone here actually bought a bonus pack at any time, please post about it here.
I think the only bundled pack I did actually buy was a Cybertron Voyager pairing, because I think it was the only way to get Soundwave at the time. And they must have had heaps of them, because it was in all the pairings I saw.