Re: In all honesty
I can agree wholeheartedly with what DoubleLayer said, but go further: unless I explicitly decide to open an account with an online provider (e.g. Amazon, for the sake or argument) then any relationship with me ends when the purchase is delivered: all data save perhaps a legal minimum recording the purchase for guarantee purposes should be deleted. The example might be a bricks and mortar store where I walk out having handed over cash and with the goods and a receipt in my hand. No further contact.
If I do choose to have an account, then the provider may record that which I purchased, and other of its products that I may have viewed but not purchased. It should not use that information for advertising beyond on-page in-site suggestions, and most definitely sell it to other sellers.
In either case, where I came from and what I looked at there is none of their bloody business.