I can tell you Hyrule Warriors with the Link Amiibo unlocks a new weapon. Thats enough new gameplay to warrant it for me.
All Zelda series amiibo will give you a random weapon, but they don't unlock anything new, they just give you weapons that you could have anyway.
I had a friend who was allergic to essentially all fruit that grew on trees.. Makes me feel lucky that I don't have any allergies that I know of 
Did that friend also have pollen allergies? What I have is called cross allergies. I'm actually allergic to different trees' pollen, but the DNA of that pollen and some fruits, vegetables and nuts are very similar, and so my body reacts to these similarities. Not many people know of this, but it's not all that uncommon. Most people just don't know they have that
I was told by an allergologist that eventually, if I keep eating the food I react to, I might become severely allergic to that food, so I avoid it as much as I can. Having a swollen and tingly throat and burning gums isn't fun anyway, so I avoid that food anyway
Here's an example of some common cross allergies:
Ragweed Allergy: Ragweed cross-reacts with bananas and melons, so people with ragweed allergies may also react to honeydew, cantaloupe, and watermelons, or tomatoes. Zucchini, sunflower seeds, dandelions, chamomile tea, and Echinacea may also affect some people.
Birch Pollen Allergy: People with birch pollen allergies may react to kiwi, apples, pears, peaches, plums, coriander, fennel, parsley, celery, cherries, carrots, hazelnuts and almonds.
Grass Pollen Allergy: People with grass allergy may react to peaches, celery, tomatoes, melons, and oranges.
