More anecdotal data, but our family (which used to spend $5k+ a year on Amazon) decided to actively buy locally and do what we can to reduce packaging waste (mainly for food). (note: I applaud Amazon's influence in the past decade fighting the clamshell package).
Just looked and we now spent less than $500 so far this year.
Reduced consumption, sometimes going without that new shiny thing and instead borrowing or buying used. For food, we simply cut out delivery (if we want resto food we go to a place that uses reusable cutlery, if we want staples, we just go to a store nearby and try to get bulk items).
Amazon has killed my trust in generic online stores. Fulfilled by Amazon sounds like a fraud engine, and I simply can't support that anymore. I'd like to know if there's a good alternative, but for now we just don't shop online if we can avoid it.