So far, this rule has made perfect sense, as the existing Meld pairs have worked around this ruling
As an added bonus, purchase of the cards do come with free postage
However, due to the 4th rank Xyz restriction, you have to take out a Dragner or Future Emperor type monster first, and in that case, you have to give up triggering when summoning magnet warrior If you dump Sigma+ and Upsilon with Superconducting Warrior Linear Magnum, revive Upsilon with Sigma+, dump Omega+ and revive Sigma+ with the effect of Upsilon, and destroy Linear with Omega+ and summon it, you can secure 3 level 4 objects that cannot be hit by Urara/Droll with one hand without a sweeper, and 2 objects even if hit by Boel Cannon
On the surface, shes a 4/7 with vigilance for five, which is pretty solid