The difference between Nintendo and Sony, is that Sony has a bunch of IPs that are beloved to some fans but those IPs were only used once or twice, look at medievil a PS1 game that got no sequels in other generations, the same happened with a lot of other IPS (Like the Legend of Dragoon), so in other words their IPs are not that popular
with Nintendo however, they have been using those IPs every generation and they are some of the most popular characters in gaming because of it, so it makes sense making money out of the popularity of those characters.
that being said even if they had amiibos i wouldn't buy them, since i don't really like the concept of buying something that is essentially "unknown future DLC", and if i want an action figure i would spend some extra cash and get a proper one.
