I don't see any evidence that is a user-driven change.

For years now, often multiple times with the save vendor, I've been installing some vendors software, using it to complete a purchase that I had started in a web interface, then uninstalling the software, all so I could take advantage of ann unrealistically good promotion. I'm not talking about the type of savings that might be in an exceptionally good holiday promotion, that eats into most of, if not all of, the margin in the transaction. I'm talking about the type of promotion that would be used to promote a credit card, banking account, or gambling platform-- the kind of promotion that costs months worth of income from a customer but is worthwhile because the customer will be milked for years to come.

This appears to be more related to modern security features that lock the vendor out of your computer, but lock you out of your phone, shifting which interface gives the vendor the advantage in future transactions.