Solivagant:
needs to be added to the list of countries operating this practice
This little exercise has indeed identified rather more countires doing so than I expected (or remembered!!)
AsiaAlmost all of SE Asia (But not Vietnam???)
Indian Subcontinent - universal
Near/Middle East - from Jordan/Lebanon to Iran (but not Turkey/Israel or Arabian Peninsular). I haven't been able to discover anything for Syria (Palmyra??) but suspect that it does/did
N Asia - not done (Stans, China, Japan etc) - except that 1 very strange "Anomaly" from Hahoe in S Korea!!!
AmericasMost of Central America (S of Mexico)
S America - only occasionally - Ecuador (fairly common) and Peru/Bolivia with 1 e.g each - but not universal in any? (Might we have missed some?)
Caribbean - quite common but not universal across all the islands.
EuropeOnly Russia has any?
AfricaUniversal across most of East and Southern Africa from Ethiopia southwards - except RSA where it is only "occasional" (??)
Only Ghana in W Africa (seems unlikely???)
N Africa - apparently not - though am very surprised re Egypt?
OceaniaNone - as yet?
I looked up Nan Madol and it appears that you pay local land owners whatever you can negotiate in order to cross their land. Can't find either for Chief Roi Mata -seems to need a "tour" anyway.
Regarding the "size" of the "Mark up" - "Tenfold" doesn't seem unusual (as per Khao Yai in Thailand which started me along this track!) - India holds the record with its normal mark up from IR30 to 500 and Petra the individual one - JD1 to JD50!!! I suspect the average is nearer 4 times? Some seem so small as to not justify even doing it (E.G Quito Cathedral from $2 to $3)!!!
It might be nice to have a "map" with those countries having the practice in one colour, and those with just a few e.gs in another. Any views as to what is the best software to use for such maps. No doubt there are other "Country related" WHS aspects which we could use such a map to show?