Not always obvious. I've stopped several relatives from making that mistake.
For some reason, they're inclined to trust Amazon.
It is always obvious.
https://www.amazon.com/Amazon-Kindle/dp/B0CNVCQZG1/
This is the first one that pops up if you search "kindle" on Amazon.
I'm not sure how more clearly you could show the variants with and without ads.
It is always obvious.
https://www.amazon.com/Amazon-Kindle/dp/B0CNVCQZG1/
This is the first one that pops up if you search "kindle" on Amazon.
I'm not sure how more clearly you could show the variants with and without ads.