Wyze cam for $5, w/ purchase of Echo Spot

I went to purchase an Amazon Echo Spot for my wyzecams, and, saw that Amazon will throw in a wyzecam for an addtl $5, which is a total of $95.

What is “the catch”? How do “they getcha?”

https://www.amazon.com/Echo-bundle-1080p-Smart-Camera/dp/B073SQYXTW/ref=sr_1_4?ie=UTF8&qid=1543066320&sr=8-4&keywords=echo%2Bshow%2Bwith%2Bwyze%2Bcam&th=1

Why must there be a catch?

Seems legit, get that device, and for $5 more get a cam.