I was thinking there might be enough slop in the tolerances to allow some flex anyway. Once the weld is compromised, there's no going back. So what you might have is false confidence. You strap those bad boys on, load up the bumper, the slop allows the welds to pop, then all you have holding the bumper on are those brackets, which is slightly more preferable than dragging the bumper and all your stuff down the highway for untold miles...
I dunno, I guess it's a neat idea in theory, but I'm skeptical of its effectiveness...
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!