Saw the quote below in another thread regarding spoilers open while turning (it was actually in the comment section under the video ) and was wondering if anyone could comment? This is the proper spin recovery technique.

"The ASW 20 killed a number of pilots by spinning inverted out of a steep banked turn with positive flaps in thermals. They would go full stick forward and rudder against the apparent rotation in an effort to recover which simply held them in the spin. "