Agreed... most people cut off the tips of the leaves when they clone... could also be the some sort of "burn" , nutes, light, etc... and they cut them off before posting pics
Clones lose a lot of their moisture and can dry out easily if you don't minimize the foliage. I will also cut my upper shade leaves in half if they are keeping lower buds from getting light and sometimes I cut outer leaves if my bloom tent is too cramped and they get in the way of my zipper.