Samsung don't warrant their cards either.
SanDisk Ultra A1 or the Samsung Evo Plus are the two better cards for the Pi as they have the faster small file read and write.
The A1 is at least designed for the OS style using and that's similar to their use in Tablets and Phones as extended (adopted?) storage
I have both manufacturers cards.
As a side the Samsung's (Evo and Evo+, the Evo Plus hasn't yet iirc) keep failing in our mobile phones and tablets (Moto, Lenovo, Huawei)
I only buy mine from Amazon, sold by Amazon.
Never eBay, AliExpress...
Cheap too, £13 gets you the 64GB SanDisk Ultra A1
The 16 and 32 GB (£8.32) are of course cheaper still.
Not worth buying slower cards really or trying eBay deals.