Running discussion on SP, page-13877

I'm a little mystified here.

I've seen it mentioned a number of times on this board that a 90% jurisdictional discount be applied to our project based on jurisdiction/isolation (at least I think that's the basis).

Wondering why such a massive discounting? Is there any empirically objective data that supports this hypothesis with source references/citations?

Thanks in advance to anyone that can assist on point. Maybe one for the guru threads...see how we go here first.

Simply, the 90% discount makes no sense to me given that DRC is home to a number of mega international mining corporations...so do we apply a 90% discount to their SP's as well?