Just for fun, not really relevant to the topic...
>GameBoy Four-Player Adaptor = Free with F1-Race
There's like, what, three games that work with this? Who can name more than a handful without looking 'em up? Useless (unless I ever manage to get my 16 player Faceball 2000 tournament going)
>Rumble Pak = Free with StarFox 64
This one went over pretty well... Not Useless
>N64 RAM Expansion Pak = $30 = Free with Donkey Kong 64
As did this one... Not Useless
>Transfer Pak = $20 = Free with Pokemon Stadium
Well, this pretty much did work with three games (well, four that I can think of)... Useless
>N64 Microphone = Free with Hey You Pikachu
heh. Useless
>GBA Wireless Adaptor = $20 = Free with Pokemon FireRed/LeafGreen
About a dozen or so games work with this and the majority of them, most people don't even know they do work with it (Some of the NES Classic series). Useless
>GameBoy to GameCube Link Cable = $10 = Free with Four Swords Adventures
Well, while I *loved* FSA and Pac-Man Vs., I'd say for the majority of people... Useless
(It's important to note that pre-orders and initial copies of FF:CC also had the Link Cable!)
>Bongo Controller = $30 = Free with Donkey Kong Jungle Beat
err, um... The Bongos didn't come free with DK:JB. DK:JB was sold by itself for $40 and the bongos were included for $55.... Anywhoo, with three games that use 'em... as much as I liked DK:JB - Useless...
And thus, packing an accessory in with a game doesn't mean crap.