30 plus years ago I read an article in the WSJ, a lady owned a flower shop and ran it on her CC use the miles to visit her daugher in Hawaii,
I was doing the same thing, remodling houses, and running a retail business, with CC floating the money...and grabbing the miles...
Today pretty much the same thing running arentals, remodling, churning CC, and a few other things, will it last?
As long as Airlines and Banks are Goverment subsidized it will be there.. profit is not in their name...bonuses and perks for politicians to ride,....so enjoy....