In that case, why not just dump DME into tap water and shake to dissolve and aerate?
I do that for almost all of my starters and it works just fine. I only boil starters if I have an old yeast pack or waking up bottle dregs - cases where I'm starting with a low cell count that can't compete as well with potential contaminants.
I like the idea behind this product, but don't see the benefit if it needs dilution.
I've also heard that Malta Goya works in a pinch. That's probably a lot more cost effective.