You realize how much a USA visa costs right?
I am sure it scares off tourism in the millions.

I am all for other countries charging reciprocity fees - and I wish more countries charged US citizens a high price for entry.


I myself will pay a visa if a place is interesting to visit:

I've had to pay for dozens of visas on my travel - some are just obvious money grabbing scams (Australia for example).

some of the most expensive
Russia - $150 (hard)
India - $90 (easy)
Turkmenistan - $90 (hard)
Kazakhstan - $90 (on arrival)
Tanzania - $50 (on arrival)
Zimbabwe - $75 (on the bridge)
Uzbekistan - $70 (on arrival)
Iran - $77 (easy)
Zambia - $80 (double entry on arrival)
Bangladesh - $51 (on arrival)
Syria - $50 (easy)

some of the cheaper ones
Kenya - $10 (on arrival)
Bahrain - $15? (on arrival)
Qatar - $27 (on arrival)
Turkey - $20 (on arrival)
Jordan/Egypt - cheap (on arrival)
Myanmar - $30 (easy)
Armenia - $8 (on arrival)
Sri Lanka - $20 (internet)
Indonesia - $10 (on arrival)

I rely on my EU passport for South America.