I see it as a way to divert expenditures from one area to another. For example, instead of paying more for extract, I use that money to buy equipment for all grain brewing. Another example, instead of spending money on more yeast, wash the yeast and use the savings to buy more equipment, etc., etc. Now that I've used up all my ideas to save money, I still buy more equipment. Whoops, now I just spend more and more money. Hey, at least I get to drink beer, while making beer!