https://prnt.sc/l35m0p
As seen in my screen shot, left is WC with out scout hall, right is with. I direct hit 13 camps on WC, blocking 8 camps. majority of hits using mary, who provides the star coins on this.
Mary got 10% extra star coins over all, but over all xp gain was only 5.5%.
I have the fast learner skill on mary and vargus, I think the scout hall ignores that.
To me this building is misadvertising. If you get xp for camps that go down when a leader falls, this should be included, if you have the fast learner skill this should be included too. I am sure the calcs are off here somewhere, and not just a blocked camps dont count issue