When the Super Famicom came along to push the PC Engine into obsolescence, it already had two controller ports built-in. But Hudson Soft still anted up with an SNES-compatible multitap, primarily for use with the company's classic 16-bit version of Bomberman. The product image in the ad isn't to scale, I presume -- its sheer size here gives the Super Multitap an unsettling take-over-the-world vibe:
One might imagine that this peripheral had limited market appeal -- an investment in the multitap virtually guaranteed spending money on additional controllers to use with it. And there weren't many worthwhile 3, 4 or 5-player games on the SNES, with Squaresoft's RPG Secret of Mana being a notable exception. The multitap was a niche product for the hardcore and casually well-off gamer.
None of this prevented Henk Rogers' team at Bullet-Proof Software from releasing their own, more compact version of the same product -- judging from the ad, demand for the Super Link was driven by Midway's goofy arcade basketball hit, NBA Jam. I assume the product had to be taken out of the box for actual use, but the ad design ensures you'll know what to look for at Electronics Boutique:
Several more of these products came to market for the SNES, a few of which supported up to 6 players. None of them was successful enough to be common today, but thanks to a few classic games these devices still fetch a reasonable price in the used peripheral market.
Some niches, apparently, are