While some argued about the best places to buy groceries, and the trolley size, others got the post's confronting message.
LordBledisloe shared their pleasure at having kicked the habit two-and-a-half years ago.
"Just checked the app on my phone and it tells me that as of today, I've saved $13,156 and am just over half way towards having the same lung cancer risk as a someone who never smoked ... I still can't shop this frugally. That's a good haul for $90."
The grocery docket. Photo / via Reddit
Another user wrote of their own experience of the sudden increase in income after quitting.
"You notice it basically the first week when you quit. especially now that its at (sic) easy $100 a week habit, imagine getting a 100 a week payrise. you definitely notice that s**t."