Clamping has been around a long time. Bib introduced it to the PE scene in 2000, IIRC. Link. Interest waxes and wanes, though the popularity of cable clamps has given it renewed focus over the past year or so.
Few understand the difference between true exreme Ulis and milder forms of clamping or wrapping for girth. IMO, that’s the primary thing pertaining to “clamping” that needs clarification. The milder stuff is fine for newbies.
I’ve tried doing extremely intense EU’s - to the point my skin was shedding small blood clots/scabs. I’ve had much better progress from lower intensity techniques. In fact, I don’t plan to do anything “extreme” ever again because it never paid off. All I got was long-lasting discoloration.