I've never heard of that, and I'm too cheap to use so much conditioner. Someone on the forum with beautiful healthy long hair (sorry my memory fails me whom but hope she'll stand up and be counted) shared how low her hair care budget was. Part of her regimen was using just sufficient conditioner and not expensive either (VO5, I think was her choice, and it lasts her a looooong time). As far as she was concerned much more was just wasteful and washed down the drain having done no work on your hair. Her logic made me wonder just how much really my hair or anyone's can really absorb of anything and I started to doubt the assumption that more was better. (Lawd knows I slather conditioner generously!) Surely if more meant better, wouldn't there be conditioners with directions such as
"Pour half the bottle in the soft bowl provided and dunk your head in it ensuring all strands are submerged. Now then pull the bowl's draw string so that you lock your head and the 2 quarts of conditioner inside the bowl, sitting up once sure the string was tied well so conditioner was locked in. Sit under a warm dryer (or not) for 30 minutes. Then bend over a bath tub and reverse the process to remove the bowl."
Surely, my LHCF sistah had a point that as long as your strands were coated, then you were OK. I mean, she had years of experience and proof it was true as her hair was long and beautifully thick.
I have had times when I would apply conditioner till my hair strands looked white, then after DCing with heat, my hair still looked white as if I had just applied conditioner. The other times I would start off with whitish hair due to conditioner, but after DCing with heat, my hair would no longer look white but rather would look shiny and black, with beautiful slip not unlike the times it had remained white. Methinks in the former incident where hair stayed white, I had used too much, and in the latter where the whiteness seemed to be "absorbed", I had used just enough conditioner. My hair never feels dry if the final result is the latter...so I know I don't ever use less than I need.
So I say all that to say, I do not see what good the method OP quotes would do. In fact, we all have heard of "excess protein" and "excess moisture" being problems on this forum. So I will stand in defiance of this suggestion and say,
less is more, IMO and that doing all of that seems very wasteful.
(Ermm...is the author of this idea selling products or (ahem) getting a cut from someone that sells products? :scratchch )