Not all players use this strategy and with so many bands. This is a strategy intended to be used predominantly in the opening to middlegame. It works best when you have an area with a lot of brown/orange, and have the rest of the puzzle fairly green already. The mojo you get in late game will tend to render this technique less effective. That said it can be effectively used in the endgame at times as well to free up rather substantial amounts of points, but less reliably than early to mid game. Don't be dismayed if it doesn't work right for you, as it seems to, like the rebuild tool, only offer gains occasionally. However this tends to give less random structures than the rebuild tool.