I get that... But there is more than one way of getting money and staying in business. There's a line that can be drawn here.
There is producing a full game, and selling it. The customer spends that money, gets the product they want. Everyone's happy. Then there's...this disturbing trend among video game companies as of late (Nintendo is far from the only one guilty of it, and weren't necessarily the first, but they are guilty of it now) where features are intentionally left out of games, and the company then provides some very annoying, costly method to get them back.
The first case I really got a taste of this was with The Sims. The Sims series is in shambles now. But for goodness sake, at least with The Sims you could spend money for what you want, and specifically get what you want. Now we're starting to move into an even darker age of DLC where the company provides DLC in random bundles. You may get what you want, you may not. And then they charge ridiculous amounts for it. Nintendo is NOT the only one guilty of this, I repeat, but with Amiibo cards, they are veering off into that territory. They know darn well that people are going to want a specific villager, or a specific item. And they know that people will spend ridiculous amounts of money to get those, if they can.
If you don't think people will, just look at Kingdom Hearts Unchained. People will spend ridiculous amounts of money for what they want, even if it's not in any physical form whatsoever.
That's a rant about Amiibo cards, though. The Amiibo themselves, I just find completely gimmicky. I understand why someone would want a model of their favorite character, but the Amiibo are not even good as models. They're really poorly made. So, even though they aren't randomized DLC like the Amiibo cards, I still don't much care for them, just as I don't really care for any of Nintendo's gimmicks.
'Furniture themed to those characters'. Oh. Great, all I need to see are more Nintendo themed houses! If I see another NES Super Mario Bros themed Animal Crossing house I'm going to scream.