Goodreads, StoryGraph, Kindles, and Kobos

I am an avid reader and I mostly consume literature on an 
ereader. There are several reasons that I prefer an ereader 
to a paper book:

First, I was in a natural disaster and lost hundreds of 
rare and expensive professional books. While they were
insured, I never could fully rebuild the collection. On 
the other hand, I was able to replace my ereader, log in 
to my account, and continue reading a novel on the page I 
had left off on before the disaster. (This also gave me a 
soothing sense of normalcy and continuity after having lost
everything.)

Second is the weight. When I was in graduate school, I 
carried a 30lb bag of books to the cafe or library to 
study. With an ereader, I can carry thousands of books in
my pocket. There is no comparison.

Third, my eyesight is getting worse with age. They call 
it presbyoptia (lit. "old eyes"). It is easier for me to 
enlarge the text of a book on an ereader than to search 
for a large print copy of a book that may or may not 
exist.

Fourth and finally, I like to read in bed. Having a 
back/front-light ereader that illuminates the entire 
page evenly is nice.

So, I like ereaders, but I don't like things like 
"licensed, not owned" frameworks, restrictive and 
aggressive DRM, and algorithmic profiling and tracking.

Kobo (Rakuten), the Canadian/Japanese ebook/ereader 
company and primary Amazon-competitor, recently 
announced that they will be integrating StoryGraph 
into their ecosystem at all levels. StoryGraph is the 
main alternative to Goodreads; both systems are 
account-based and allow users to rate books, share 
what they are currently reading, track their own 
reading habits, engage in discussions, post TOP 10
style lists, win achievement medals, etc.

Goodreads is a subsidiary of Amazon, so obviously it 
is a gold-mine of user data for the ebook and book 
retailing giant. KOBO is now integrating with 
StoryGraph in the same way that Amazon inegrates 
Goodreads. If a person has a StoryGraphs account and 
links it to their Kobo account, StoryGraphs will auto-
matically track that person's reading habits and 
preferences for both Kobo and Overdrive/Libby (library) 
books. 

My question is simple: WHY!? would user voluntarily 
opt into such a data-tracking system?! It boggles my 
mind.

It is as if people don't grasp that independent 
companies like StoryGraph make money by SELLING your 
preferences, habits, and data to retailers and those
measuring market trends. How do they think these companies
make money? What do they believe the business model is?
"Create community and encourage reading goals?" Are 
people dumb enough to actually take Mission Statements
seriously in this day and age?

Fortunately, at least in theory, all of us with ereaders 
can simply not use the service by not having or linking 
a Goodreads or StoryGraph account. It certainly raises 
questions, however, about how much the devices themselves 
track and report back about reading preferences and 
habits *without* our consent or option.