I always argue this point, after seed you always, always always lose vigor, 50%, and every time you take a clone its 50% less, but after you take a clone of a clone... its only 50% of 50% of 50%, so the first clone is 50%, second 75%, third is 8?% and so on. I guess I'm not a scientist but that seems correct to me. If your continually taking new clones from the same mom that isn't a big deal, what makes it bad is when you turn a clone from the mom, into a mom, take a clone from the clone-mom, then turn that clone into a mom, I would have to imagine the bud would be getting slightly worse at the least every time.
its all the same after about 20 times here. according to your 50% math I should be at nearly zero long ago lol it just ain't happening. no loss in vigor/bud quality whatsoever here