Having (accidentally but spectacularly set my last Kindle Fire on fire, I bought a new one on Prime Day. It’s the top-of-the-range one and I’m very happy.
But.
When I turned it on, it knew who I am. Fair enough, I expected that. But it then proceeded to install updates.
Then it asked which wifi network to connect to. I didn’t need to enter a password.
My inference is that it was shipped with my wifi password already stored … which suggests Amazon has stored my wifi password.
Yes they do - you missed the opt out when you told your first Amazon device your WiFi password.
Yes, a frightening amount of stuff is stored on your Amazon account. I’m not that comfortable with it.
Not worth a new thread, but I’ve just been looking for something (could be anything) on Amazon fr prime. Earliest delivery seems to be 19th July - 6 days time (normally one or 2).
Well the 14th is a Friday so that knocks the weekend out I should think, transport wise.
and 14th July is a Holiday here in France… so not surprising …
Off topic but not, it’s fascinating me that, outside of events like prime day, the core ‘internet shopping’ part of the amazon business is dropping while it’s far east rivals (Ali Express, Shein, Temu etc) is growing. I’m not sure anyone would say they were ‘better’ aside from on price perhaps, but it’s very interesting that even a business with such a stranglehold like Amazon isn’t necessarily immune to changing behaviours by consumers. Perhaps we’ll see it pivot from a retailer to a digital infrastructure business given AWS is so dominant.
These days it’s not often we buy from Amazon… but information is certainly leaked somewhere… we get message after message… talking about “failed delivery” etc etc … “pay this to release the package” etc etc … all scams…
a flurry of these emails arrive within a day of our order being placed… and they only stop coming once the article is correctly delivered by Amazon…
As we only buy about once a year… and these scams only encircle/highlight this momentous event… we’re not just receiving off-the-cuff scams throughout the year… they are a direct result of us placing the order… 
That’s not because you use Amazon, it’s because your number is in a list that scammers use. They just assume that a lot of people use Amazon and send out tens of thousands of texts. They only need to catch the odd person to make it worthwhile
As I say… the scams only arrive if we’ve placed the annual order … which can be anytime or not at all … they do not arrive throughout the year… 
some years we don’t get these scams at all if we haven’t ordered anything … tooo much of a coincidence
I think you are quite right. Email adresses and phone numbers are hacked from may sources.
Something I set up, which is simple to do and just requires I keep my wits about me before ever sending an email or pushing Reply, is to open entirely different email addresses for each, or some like groups, of vendors.
Amazon gets its own email address, and name. Deliveries, at least a couple a month, all work well and I have never received a single scam email. Dog food and treats suppliers all get their own email box. Beauty supplies, another. Etc…
On the very rare odd occasion I do get an unrelated email, I can immediately see it is a scam if the Inbox is incorrect or I’m addressed incorrectly for the supplier it is pretending to be.
Generally, I have found Amazon to be fast (Prime), reliable and indispensable for otherwise unobtainable items that I want but would not know where else to find.
The only caveat is that based on a Google comparative search, I sometimes find Amazon not to be the cheapest option. Sometimes by far. However, when it is the only option, then the choice to buy or not is mine.
Another protection is to always pay using PayPal. The vendor from whom I am buying doesn’t even see that my Pay Pal account has, you may well guess, yet another mail.