I have 126 skunk half dollar boxes so far this year - 44% of all my boxes. If I don't see any enders, I expect a skunk, and am thrilled any time I find silver.
I can't swear I would keep doing this if I had some of the skunk streaks folks are reporting here. I'm just getting into this and found one 90% half in two boxes. I will stick with the boxes but keep it low-volume, mainly because I don't have a great dumping plan yet. I found another 90% in loose teller halves. I sometimes think about keeping things limited to loose teller halves and CWRs. I may never build a big stack this way, but it might have the right trade off (for me) in terms of time and money devoted to halves compared to the odds of finding something.