..And? Did everyone stop buying nintendo products because they were OUTRAGED about the content they were missing out on?
It really doesn't matter since they made up 0.001% of the content of whatever game it was most of the time. The games where the amiibo content was actually relevant were the minority.
People still bought the games and weren't exactly crying when they missed out on say, a new hat for mario or whatever. I'm sure if they want to say, make it so you can use a cardboard sword in zelda or whatever, nobody's exactly gonna be raging about missing out on content
Also keep in mind amiibos were explicitly designed to be a companion to nintendo games, this wasn't.